Linux command substitution and nested substitution Linux Leech 2026-09-19 | Linux command substitution and nested substitution
Installing Docker Apps On Synology NAS and Using Docker On The Command Line Linux Leech 2020-08-11 | In this video we do a comparison of two different Docker images that accomplish the same task.This is a deeper look and the previous video youtu.be/WWR3dT5A2KA covering "setting up an iperf3 server on a Synology NAS" We compare both of the dockerfiles that are used to create their corresponding docker images.We then create containers from each of these image files and make some modifications to each of the containers. With both of the containers running we look at the resource usage of each and also how we can obtain the output from each of our running containers. We finish off by using SSH to operate docker on a Synology NAS and startup a modified container from one of our iperf3 images so that we can run a bandwidth test from our Synology NAS to our local machine. #synology #docker #linuxSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Record Android Phone with Audio - NO Cables OBS Tutorial Linux Leech 2020-08-09 | Record your Android phone's screen and audio without cables using OBS.This is a totally wireless solution and has better control quality and frame rates than Miracast.How to Stream Android Audio To Windows 10 - 2020youtu.be/sFrwqXaAGTUAndroid Screen Recording: How To Record and Control Your Android Phone - Windows 10youtu.be/MWKqus1XbGQIn this video we record an Android phone's screen and thephone's audio, without using a USB cable or an aux cableplugged into your windows 10 computers line-in to get sound from your phone.Content:0:00 Intro0:30 Connect to phone1:04 Add Android phone screen to OBS source2:40 Capture phone audio4:04 Test Recording5:45 A few Issues6:40 OutroSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Android Screen Recording: How To Record and Control Your Android Phone - Windows 10 Linux Leech 2020-08-08 | Record and control your android phone from your Windows 10 computer.There are plenty of tools that accomplish the task of Android screen recording but most of them have low frame-rates, watermarks, capped resolution and limited recording time. The tool that we use in this video does none of this and can be used totally free without any of the above limitations.In this video we install scrcpy to record and control our Android phone from a Windows 10 computer.This is a method of recording an Android device that works with NON-Rooted Android devices and givesus a huge amount of control over the recordings. We can lock the rotation of the device, limit frame-ratescale the resolution, enter text and commands from the controlling computers keyboard send files and installapk files simple by dragging and dropping the files onto the scrcpy window and a whole load more.Scrcpy also does not watermark your recordings or limit the resolution or duration like some other android screen recorders.0:00 Intro0:22 Download scrcpy0:59 Extract scrcpy to Windows 10 computer1:52 Add scrcpy to system path3:30 Start ADB server4:30 Enable developer options and USB debugging on phone5:28 Connect phone to Windows 10 computer6:15 Run scrcpy7:00 Record android phone screen8:30 Control and record android phone using WiFi11:32 Record android screen over WiFi13:23 Stopping and Starting the ADB server15:10 Closing comments15:53 OutroScrcpy Windows 10 download:github.com/Genymobile/scrcpy#windowsScrcpy Features:github.com/Genymobile/scrcpy#features#streamandroid #Androidrecorder #scrcpySubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
How to Stream Android Audio To Windows 10 - 2020 Linux Leech 2020-08-07 | How to play android audio through your PC speakers.In this video we cover how to stream audio from your android phone over Bluetooth to a Windows 10 PC.This used to be possible with Windows 7 using third part apps as Windows 7 supported A2DP sink.For some reason Microsoft removed it from Windows 10 but this feature is now back in Windows 10 with the release of the Windows 2004 feature update.You will also need to download the "Bluetooth Audio Receiver" app from Microsoft store.0:00 Intro0:36 Update Windows 10 to feature update release 200401:18 Pair phone with PC over Bluetooth02:26 Get phone to output audio over Bluetooth02:53 Download and install Bluetooth Audio Receiver03:24 Open audio connection to phone03:50 Play audio from phone to Windows 10 PC audio test04:40 Closing commentsBluetooth Audio Receiver App:microsoft.com/en-us/p/bluetooth-audio-receiver/9n9wclwdqs5jHow to install scrcpy:youtube.com/watch?v=MWKqus1XbGQ#windows10 #bluetoothaudio #recordphoneSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Iperf3 On Synology NAS Using Docker APP Linux Leech 2020-07-16 | In this video we setup iperf3 for testing network bandwidth on a Synology NAS using docker.The docker container that we use, can be started as an iperf3 server using the Synology docker app.It will run continuously until you stop the container from within the app.If you don't want to run this iperf3 container as a server you can overrideit's default behaviour by starting the container from the command-linewith your chosen iperf3 options.#linux #synology #dockerSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Control and Record Android From PC - Linux Linux Leech 2020-06-28 | In this video we build and install scrcpy to control and record the screen of an Android phone from a Linux PC. We start by connecting to the Android phone using a USB cable followed by connecting over WiFi for a totally wireless solution.Build instructions page: github.com/Genymobile/scrcpy/blob/master/BUILD.mdScrcpy main page: github.com/Genymobile/scrcpy0:00 Introduction0:37 Scrcpy github page1:41 Install scrcpy dependencies3:31 Download scrcpy server4:56 Compare hash of downloaded scrcpy server6:23 Configure and build scrcpy8:47 Enable developer options9:45 Start adb server10:06 Authorise device 11:28 Connect to phone over WiFi11:44 Get Android Phone IP address14:00 Revoke USB debugging authorisation14:34 Disconnect Andoid device from adb15:26 Scrcpy controlling android phone15:57 Record Android phone screen using scrcpy18:24 Restart adb server20:26 OutroSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Change Screen Size of Android X86 Virtualbox VM Linux Leech 2020-06-07 | In this video we go over how to change the screen size and resolution of an Android x86 virtual machine running under Virtualbox.Create Android 9 Pie virtual machine with Virtualboxyoutu.be/137jBpJniNsSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Android VM - The best Android X86 VM for Gaming Performance! Linux Leech 2020-05-28 | In this video we compile a custom version of QEMU with virgl enabledto get better graphics performance for Android 9 pie x86 virtual machine.PUBG mobile running in this Android x86 virtual machine:youtu.be/Z4vL03g37w0Virgl:virgil3d.github.ioSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Install dependencies:sudo apt install -y build-essential libepoxy-dev libdrm-dev libgbm-dev libx11-dev libvirglrenderer-dev libpulse-dev libsdl2-dev libgtk-3-devDownload qemu 3.1.1.1:download.qemu.org/qemu-3.1.1.1.tar.bz2Within the build directory that we just created:../configure --with-sdlabi=2.0 --enable-sdl --enable-opengl --enable-virglrenderer --enable-system --enable-modules --audio-drv-list=pa --target-list=x86_64-softmmu --enable-kvm --enable-gtkOnce configuration has completed run make to compile QEMUmakeInstall qemu-utils to get qemu-img:sudo apt install qemu-utilsMake our virtual hard disk:qemu-img create -f qcow2 Android9.img 12GAdd your user to kvm group:sudo adduser $USER kvmAdd a udev rule for KVM in /lib/udev/rules.d/99-kvm.rulesKERNEL=="kvm", GROUP="kvm", MODE="0666"Download android x86android-x86.org/download.htmlCreate our first virtual machine to install android x86 in:./x86_64-softmmu/qemu-system-x86_64 -boot d -cdrom "android-x86_64-9.0-r2.iso" -enable-kvm -smp 2 -device virtio-vga,virgl=on -net nic -net user,hostfwd=tcp::5555-:22 -cpu host -soundhw es1370 -m 2048 -display sdl,gl=on -hda Android9.imgAfter installation boot the VM without the cd-rom drive and tell QEMU to bootfrom the disk that we created:./x86_64-softmmu/qemu-system-x86_64 -boot c -enable-kvm -smp 2 -device virtio-vga,virgl=on -net nic -net user,hostfwd=tcp::5555-:22 -cpu host -soundhw es1370 -m 2048 -display sdl,gl=on -hda Android9.imgTo see if virgl is working within the VM:Inside of the android vm open terminal emulator and type:dmesg | grep virgl-------------------------------------------------------------------------------To remove all of the work we have done from your system.To remove qemu 3.1.1.1 just delete the qemu3.1.1.1 directory.remove the dependenciessudo apt remove -y build-essential libepoxy-dev libdrm-dev libgbm-dev libx11-dev libvirglrenderer-dev libpulse-dev libsdl2-dev libgtk-3-dev#kvm #virgl #androidx86Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
PUBG Mobile on PC - Android X86 Virtual Machine Linux Leech 2020-05-28 | PUBG Mobile running inside a Virtual Machine on PC.Walk-through video detailing how to get this working:youtu.be/bz8FugjsHs8Subscribe: youtube.com/user/linuxleech?sub_confirmation=1#PUBGMobile #Virgl #KVMMusic:Jeremy Blake Let's Go Home Youtube audio libraryBlog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Cant Write! - Disk is Read Only! Ubuntu and Windows 10 Dual Boot Linux Leech 2020-05-17 | Having issues with hard disks being read-only? Dual boot Linux with Windows 10? This will probably fix your issue.There are a number of reason why a disk might be read-only the most common is, you do not have the correct permissions.In this specific instance the issue is the way Windows 10 shuts down, or doesn't.Windows 10 has a feature called fast start-up. What this does is put your computer into some kind of hibernation state when you click shutdown, instead of actually shutting down your machine. If you click restart instead of shutdown your computer actually restarts.This Windows 10 feature can cause error messages like "Unable to create steam library, HDD "Read-Only"" to occur when you are using your Linux OS.In this video we go through all of the steps needed to disable Windows 10 fast start-up.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Install Android 9 Pie X86 in Virtualbox - 2020 Linux Leech 2020-05-14 | In this video we go through the process of creating a virtual machine with Virtualbox, for Android 9.0 Pie X86.Followed by installing Android 9.0 Pie X86 within our newly created and configured Virtualbox virtual machine.With working audio and internet/network connection.Android x86 home pageandroid-x86.orgSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Install Android 8.1 Oreo on Vmware Player - The Correct Way Linux Leech 2019-07-03 | A simple walk through to get Android 8.1 Oreo x86 installed in Vmware player 15 and permanently fix the Android not booting with blank/black screen issue.Android x86 home pageandroid-x86.orgSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Install Android 8.1 Oreo x86 in Virtualbox Linux Leech 2019-07-02 | How to download and install android 8.1 Oreo x86 in Virtualbox 6.0.A simple step by step guide to installing the x86 version of Android 8.1 Oreo in Virtualbox 6.0.With working audio and internet/network connection.Android x86 home pageandroid-x86.orgSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech#android #virtualbox
Virtualbox 6 Performance Trick to Get More Video Memory Linux Leech 2019-06-27 | In this video we increase a Virtualbox virtual machines vram from 128MB to 256MB using vboxmanage. Once you have changed the vram setting using vboxmanage modifyvm you will notice that the slider within the GUI settings for your VM now allows you to increase the vram up to 256MB.After increasing the vram of our virtual machine we start it and check to see if the virtual machine can actually see the extra vram. Install Oracle Virtualbox 6.0 on Windows 10:youtu.be/BmY0a9PSZgsInstall Oracle Virtualbox 6.0 from Oracle repo Ubuntu 18.04:youtu.be/7HmzUhw_rpwInstall Oracle Virtualbox 6.0 on Ubuntu 18.04 GUI:youtu.be/2zIQmcvjO6MSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Install Oracle Virtualbox 6, Extension Pack and VBoxManage on Windows 10 Linux Leech 2019-06-26 | How to install Oracle Virtualbox 6.0, virtualbox extension pack and configure system path so vboxmanage works on the command line.Oracle Virtualbox download:virtualbox.org/wiki/DownloadsSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Install Oracle Virtualbox 6 and Extension Pack on Ubuntu 18 04 from Oracle Repository Linux Leech 2019-06-26 | All of the steps needed to install Oracle virtualbox 6.0 and the extension pack from the Oracle Virtualbox repository on Ubuntu 18.04 LTS. Oracle Virtualbox instructions:virtualbox.org/wiki/Linux_DownloadsSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Install Oracle Virtualbox 6.0 and Extension Pack on Ubuntu 18.04 LTS - GUI Version Linux Leech 2019-06-26 | How to install Oracle Virtualbox 6.0 and the extension pack on Ubuntu 18.04 LTS without using the terminal or add a repository.Virtualbox download:virtualbox.org/wiki/DownloadsSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Nautilus File Manager Scripts - Adding Superpowers to your File Browser Linux Leech 2019-06-21 | Nautilus scripts allow you to add extra functionality to the Nautilus file browser. We first created the directory to hold our Nautilus scripts then proceeded to write a very simple script that resizes any selected images and save a copy of them to the same directory as the original images.We then went over some of the things that you need to be aware of when creating your own scripts.You can create directories within your Nautilus script directory so that you can organise your scripts into sub categories. This will translate to sub items in your right click menu with the name of the corresponding directory. This is useful if you end up utilising a large number of Nautilus scripts. Personally I haven't found the need to use this feature as I have never gone above 10 Nautilus scripts.Command substitution tutorial:youtu.be/hMGHqDz6fPcFFmpeg tutorials:youtube.com/watch?v=_PMpxfhqNxQ&list=PLew9cBMjbI-11hiki-_yxtBnUdlDFIx0xSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Install FFmpeg on Windows 10 - 2019 Linux Leech 2019-06-20 | How to Install FFmpeg on Windows 10 Easy and Fast.In this video we install FFmpeg on Windows 10 first we download and extract a static build of FFmpeg we then add our downloaded FFmpeg build to our system path so we are able to run it from any directory on our Windows 10 system simply by typing FFmpeg and not the full path to our FFmpeg binary.Download link:The download procedure has changed slightly you will need to download a specific zip file from the github link below:github.com/BtbN/FFmpeg-Builds/releases You need to download the ffmpeg zip file ending in "win64-gpl-4.3.zip"--ffmpeg.zeranoe.com/builds/-- old link no longer worksWe finish off with testing our newly installed instance of FFmpeg by changing the scale of a 4k video to 1080p. One thing to note about this static build of FFmpeg is that it comes with support for nvidia nvenc hardware accelerated encoders and Intel quick sync.So if you have a modern NVIDIA graphics card that has nvenc or a modern Intel CPU with support for quick sync you will be able to utilise those to dramatically accelerate video encoding tasks with FFmpeg.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech#ffmpeg
FFMPEG Python - Convert Audio Files to MP3 SUPER FAST ! 🔥 Linux Leech 2019-06-14 | FFMPEG Python - Convert Audio Files to MP3 SUPER FAST ! 🔥How to convert thousands of flac, wav, wma, aac, m4a, aiff, webm, ogg, opus or raw audio files to mp3 🔥super fast🔥 using ffmpeg and Python.In this video we start off by simulating a bash for loop and converting the flac test files sequentially using ffmpeg to demonstrate that only one CPU core is used to transcode the group of flac files to mp3 files using this method. Leaving all of the other CPU cores essentially idling.We then modify the python script with one simple change to use all of the available CPU cores to convert our flac files to mp3 files and this gives us a massive speed boost, we cut down the transcode time significantly.Finally we increase our transcode speed even more by using variable bit rate (VBR) mp3 files instead of creating constant bit rate (CBR) mp3 files.This allowed use to increase our transcode speed to over 725%🔥 ( yes you read that right, Seven hundred and twenty five percent speed increase ) faster than our bash for loop method.We could probably get this speed increase go a little higher if we were to use asycio instead of a thread pool as this would eliminate the thread creation overhead and thread banging wouldn't occur. I may test this in the future but I think over 725%🔥 speed increase is pretty good for a 20 minutes rough python script.Would be interesting to see how fast this would be on a 64 core AMD Threadripper.🔥OS: Ubuntu 19.04FFmpeg version: 7:4.1.3-0ubuntu1Github: github.com/Linuxleech/flac-to-mp3Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
FFMPEG Reverse Video - Audio and multitrack Linux Leech 2019-06-11 | FFMPEG Reverse Video - Audio and multitrackHow to Reverse a video with or without audio and video with multi track audio using FFMPEG.In this video we go over how to reverse a video independent of the audio so the audio will play normally while the video is reversed. We then move on to reversing the audio as well. Finally we get to working with a video file that contains multiple audio tracks.Using a complex filtergraph (filter_complex) we reverse the video and one of the audio streams then map the output to a new file that contains the reversed video stream, the reversed second audio stream and the original first audio stream that has not been reversed. Resulting in an output file that has reversed video, the first audio track playing as normal and the second audio track playing in reverse.The hardware accelerated encoder used (h264_nvenc) in this video requires a current nvidia GPU that supports nvenc and was chosen as it is significantly faster at encoding video compared to libx264. Also ffmpeg needs to be compiled with nvenc support in order to use this encoder. If your machine does not have this hardware and/or your ffmpeg install is not compiled with support for this hardware you can use any other encoder that you do have to encode your reversed video. This video will show you how to view the encoders that you have available in your ffmpeg install youtu.be/lW7DQaWjus4You could also not explicitly set an encoder, as ffmpeg does have defaults that it will fall back to.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
FFMPEG Add Audio to Video - Single and Multitrack Linux Leech 2019-05-29 | FFMPEG Add Audio to Video - Single and MultitrackHow to add one or many audio tracks to a video using ffmpeg.In this video we go over how to add audio from an mp3 file source or from a video source and copy the audio over to a new video that doesn't have an audio track.We follow on by adding a second audio track to a video making it a dual audio track movie and changing the order of the audio tracks within the video.Finally we change which audio track is marked as default, this has the effect of being the audio track that video player chooses to play.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
FFMPEG Encoder Settings - How to View Encoder Options and Settings Linux Leech 2019-05-29 | FFmpeg Encoder Settings - How to view all encoders and their specific settings.In this video we go over how to view the installed encoders that you have available in your FFmpeg installation and how you can select a specific encoder and view all of its settings.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech#ffmpeg
Extract Audio from MP4 Video using FFMPEG - Easy Linux Leech 2019-05-28 | Extract Audio from mp4 Video using FFMPEG - to not only extract a single audio track but also multitrack audio too.We also extract all audio tracks from an mp4 file that has multiple audio tracks and convert them all to mp3 files at the same time.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
FFMPEG Atempo - Speed Up and Slow Down Audio Linux Leech 2019-05-23 | FFMPEG Atempo - Speed Up and Slow Down AudioIn this video we go over how to use the ffmpeg atempo audio filter to speed up audio clips beyond 2 times speed and slow down audio below 0.5 speed.ffmpeg version 3.4.6-0ubuntu0.18.04.1Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
FFMPEG - Split Video into Separate Clips Linux Leech 2019-05-23 | Auto cut video into clips - In this Video we go through how to use FFMPEG to split a video into separate clips of varying lengths.We start with making a single short sub-clip of a video and progress on to producing a short script that will cut up an entire video of any length into individual 10 second video clips.ffmpeg version 3.4.6-0ubuntu0.18.04.1Test video:pexels.com/video/different-kinds-of-vehicles-on-the-freeway-2053100Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Export Variables - Why you need to Export BASH Variables Linux Leech 2019-05-07 | Export Variables? - Why you need to Export BASH VariablesWhy do you need to export variables?In this video we go over the usage of the export builtin.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Source Shell Script vs Executing Shell Script - The Real Difference Linux Leech 2019-05-03 | Source Shell Script vs Executing Shell Script - The Real DifferenceWhat is the Real Difference Between Sourcing a Shell Script and Running a Shell script?In this video we go over the real difference between sourcing and running a shell script in BASH and how exporting environment variables from one script can give you access to them in another. Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Path Variable and How to Change it - Linux Linux Leech 2019-05-02 | Path Variable and How to Change it - LinuxHow to add, remove and save path changes in Linux - the right way.In this video we go over the files and methods that you need to edit, add or remove directories from you path variable. We also cover how to make changes that will be applied system wide to all users or just one specific user on your Linux machine. We also go over why and how the path variable is exported.VM's used were Ubuntu 19.04 and Fedora 22#Linux #SystemPath #EnvironmentVariablesSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Emoji - How to Type Them in Ubuntu 19.04 Linux Leech 2019-04-20 | Emoji - How to Type Them in Ubuntu 19.04Just a short video showing you how to type emoji in Ubuntu 19.04 the terminal and other GTK applications.I am fully aware of the right click menu "emoji picker" but that doesn't work in Gnome terminal, and doesn't cover all of the possible Unicode characters that are available to you.You can use this method to type any other Unicode characters.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Cut Command in Linux Linux Leech 2019-04-19 | Cut Command in LinuxIn this tutorial we go through the usage of the cut command ranging from cutting csv files and cutting fixed width files to cutting piped data. We also cover some of the rarely used flags that cut has tooffer like null byte line delimiters.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Ubuntu 19.04 Enable and Disable Fractional UI Scaling for HiDPI Displays Linux Leech 2019-04-14 | In this short video we go over how to enable and disable the new gnome 3.32 fractional UI scaling feature in display settings on Ubuntu 19.04 Disco Dingo.We go over two method to do this. The first is to use dconf editor to do it graphically and the second method is on the command line using gsettings.The fractional UI scaling feature is experimental in gnome 3.32 and can be enabled for both Wayland and X11.Before the release of gnome 3.32 which is included in Ubuntu 19.04 the only options in the display setting for scaling were very coarse and limited to 2x and 3x scaling. But with fractional UI scaling you now have a more granular set of choices for you HiDPI display. Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Nohup - Hangup Immune Commands - Commands for Linux Linux Leech 2019-04-11 | Nohup - Hangup Immune Commands - Commands for LinuxIn this video we cover nohup and look at how we can use it to create hangup immune background jobs that you can still send data into.As nohup is part of the GNU coreutils, if you have the ls command you will have nohup.Lets say that you want to run a command or script on a remote machine over SSH. If for any reason you loose connection to that machine, whatever you are running will terminate.You might be thinking, well I can just use a multiplexer like screen or tmux, and you would be correct. Either of these will solve this issue. The only problem is tmux and screen might not be installed and you may not have the ability to install one of them. This is where nohup comes in. All you need to do is prefix your command, shell script or pipeline with nohup, run it as a background job with ampersand "&" and you are done.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Jobs Command in Linux Linux Leech 2019-04-11 | Jobs Command in LinuxIn this video we go over the jobs command and how to control jobs in the terminal. We cover all of the ways that you can control command line jobs in Linux as-well as how to use nohup for hangup immune background jobs. We also cover bg and fg usage to bring jobs to the foreground or send jobs to the background. We also cover how to use kill to send different kill signals to background jobs.At it's simplest a job is a single command. Like ls. A job could also be something more complex like a pipeline, this would also be classified as a job or even a shell script.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Python vs BASH - IO Performance Linux Leech 2019-04-04 | Python vs BASH - IO PerformanceWhich is faster python or BASH? The results will shock you!In this video we test the performance of the empty file creation methods used in "7 ways to create empty files" The shell script test took 60 days to run and produced some surprising results.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Random Number Variable in BASH - Linux Commands Linux Leech 2019-04-03 | Random Number Variable in BASH - Linux CommandsIn this video we go over how to generate random numbers in bash using the random builtin variable. The random variable doesn't act like any normal variable in BASH. Assigning a number to the random variable seeds the variables random number generator instead of storing it.As the random variable generates pseudorandom numbers, by controlling the seed value you can actually predict the numbers that the random variable will produce.The first example that we go over is how to produce random numbers that are within a range of 0-10 and 1.10.We expand on this in the second example by restricting the numbers produced to be a binary random choice of either 0 or 1.Following on we create a dice roll by restricting the range of random numbers to be 1-6.In the next example we shift the range to start at 1000 instead of zero or one and restrict the upper limit to 1500.The final example illustrates a method to create numbers larger than the largest number the random variable is capable of producing which is 32,767.We generate 6 digit random numbers but the same method can be used to produce much larger numbers.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Run Shell Script on Login - Programs and Apps Too - Ubuntu Linux Leech 2019-04-02 | Run Shell Script on Login - Programs and Apps Too - UbuntuWe start off in the GUI by launching a program when we login then move on to see how gnome does this, and look at the files and directories involved.Finishing with a dot desktop file that we create manually to run a shell script.To create the dot desktop file we use a helper tool called desktop-file-edit which allows us to set our desktop file key value pairs with command line arguments.Desktop-file-edit also uses another tool to validate our dot desktop file before it creates it to make sure it is correct, the validation tool is desktop-file-validate.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Google Chrome NEW Easter Egg - 2019 Linux Leech 2019-03-30 | Google Chrome NEW Easter Egg - 2019Found a new google chrome easter egg game. You don't have to play as a t-rex dinosaur.April Fools!Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Tee Command in Linux - with examples Linux Leech 2019-03-26 | Tee Command in Linux - with examplesSo the tee command line utility allows you to spur off from your current command pipeline at a given point and write to a file, while allowing you to continue with your pipeline.Some common uses for tee include downloading files and computing hashes, while the file is downloading. So you can confirm against a provided hash that the file wasn't corrupted during download.Another common use for tee is to watch the output of your command pipeline while you are also saving the output to a file for later reference. Watching logs is like clock watching, sometimes you just need a summary of the data in your pipeline once it completes doing whatever it is doing.You can use tee for this too. So at the end of your pipeline if you pipe into tee you can save the output for later reference and pipe on to some other utilities to calculate a summary, like count the number of lines processed etc.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Named Pipes - Inter-Process Communication Linux Linux Leech 2019-03-21 | Named Pipes - Inter-Process Communication LinuxIn this video we go over named pipes using mkfifo. Starting with a brief explanation of FIFO ( first in first out ) and LIFO ( last in first out ).Followed by examples of how to use named pipes and some of the pitfalls that you would encounter such as broken pipe errors and blocked pipes.We also cover having multiple processes writing to a single named pipe at the same time and the reason why having multiple readers of a named pipe is not such a good idea unless you are using a named pipe as a queue.Named pipes are not frequently used but do have a certain efficiency going for them. As the data that is sent through a named pipe is stored in memory the main benefit is speed. So for any process that you would normally think of using a temporary file you could probably use a named pipe instead.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Command Substitution vs Process Substitution - What is the difference? Linux Leech 2019-03-14 | So what is the difference between command substitution and process substitution?This is quite a common point of confusion for new users of Linux and BASH. On the surface they can seem quite similar in their function but they are different and are useful for very different situations.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleechGoogle+: http://www.gplus.to/linuxleech
Process Substitution in BASH - Commands for Linux Linux Leech 2019-03-12 | Process Substitution in BASH - Commands for LinuxProcess substitution allows you to run a single command or many commands in a subshell. You can then choose to either read from or write to your subshell.By using process substitution you can replace a lot of workflows that would normally require you to create temporary files and have multiple command lines. You can accomplish most of these types of flows using process substitution, and all on a single command line.One thing to remember when using process substitution is that you need to treat each process substitution in the same way that you would treat a file. For example you cannot provide echo with a file path and expect it to print out the content of the file. If you use echo in this way it will just print out the path to the file descriptor that was used for you process substitution.In this video we cover a few examples using process substitution the first example shows you how to produce a side by side listing of two different directories using pr, ls and process substitution. The second example uses diff toshow us the files that are in one directory and not in the other.In the final example we use md5sum to hash text that is written to our process substitution and demonstrate how the commands within our process substitution perceive this data.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Stderr Stdout and Stdin - How to Redirect them - Commands for Linux Linux Leech 2019-03-05 | Stderr Stdout and Stdin - How to Redirect them - Commands for LinuxThis video will show you how to redirect standard input, standard output and standard error also known as the standard streams. Throughout this video we go over redirecting standard error( stderr ) and standard output ( stdout ) to files so that you can have both outputting to the same file or separate files. We also cover redirecting stdin.There are many reasons to redirect stdout and stderr. An example of this would beyou are dealing with a program or utility that spams a large amount of output to the screen but you are only interested in error to diagnose some problem. You could trawl through the output searching for errors, but this is time consuming itwould be a much better idea for you to just redirect stdout to /dev/null and you will be left with only error displayed within your terminal.Redirection of these three standard file descriptors is common to see in bash scripts along with using exec to make your own file descriptors and is just another handy tool to have at your disposal.Just remember if you are redirecting stdout, stderr or both to a file and you want to keep the output from previous redirection make sure you append with double greater than signs as this will stop you from clobbering data that was previously written to your file.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
Empty Files - 7 Ways To Make Them That You May NOT Know Linux Leech 2019-02-27 | Empty Files - 7 Ways To Make Them That You May NOT KnowWe go over 7 way that I know to make empty files. Do you know anymore ways?Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech#emptyfile
Command Separators - Commands for Linux Linux Leech 2019-02-26 | What are command separators ?In this video we go over command separators and command grouping. We explore the uses of the semicolon delimiter the significance of the newline character, grouping commands within parentheses to fork a sub shell, creating multiple background jobs on a single line using ampersand and escaping end of line characters to create multi line command lines. We also cover some of the pitfalls you may encounter while using these techniques.Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech#commandseparation #commandgrouping
Python Typewriter - Make your Computer Sound like an Old Typewriter - Linux - Part Two Linux Leech 2019-02-24 | Python Typewriter - Make your Computer Sound like an Old Typewriter - Linux - Part TwoPart two of the linux typewriter.Part 1:youtu.be/0Bk6ihHlpB0Github:github.com/Linuxleech/Linux-typewriterSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech#linuxtypewriter #linuxleech
Python Typewriter - Make your Computer Sound like an Old Typewriter - Linux Linux Leech 2019-02-24 | Python Typewriter - Make your Computer Sound like an Old Typewriter - LinuxIn this video we look at one way to make your keyboard sound like an old antique typewriter. We start off working out how we can read keystrokes from our keyboard and finish up with a python script that is able to read keystrokes globally.In case you are wondering, yes I am fully aware of Xlib and I am aware that I misspelled typewriter for the directory name.Part 2:youtu.be/AgASehFGsbYLinks:kernel.org/doc/Documentation/input/input.txtgnu.org/software/libc/manual/html_node/Elapsed-Time.htmlGithub:github.com/Linuxleech/Linux-typewriterSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech#linuxtypewriter #linuxleech
Cron Grandfather Clock with Python - Linux Linux Leech 2019-02-21 | Cron Grandfather Clock with Python - LinuxIn this tutorial we make our computer toll and chime like an old grandfather clock every hour on the hour using the crontab and Python in linux.To accomplish this we write a small python script that gets the current time and uses the hours field to work out how many times the chime needs to play. This is preceded by the customary ringing associated with grandfather clocks.A simple cron job is used to run our script hourly. All of the code and sound effects used in this tutorial are available on github.Github:github.com/Linuxleech/Grandfather-clockSubscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
RESIZE Panes - GNU SCREEN Linux Leech 2019-02-20 | RESIZE Panes - GNU SCREENIn this tutorial we cover how to change the size or dimensions of gnu screen panes. You can resize panes in units of characters or percentage of your main windows width or height.When resizing panes whether it is in height or width the first step is to make sure that the pane you wish to resize is the pane in focus. I.E the keyboard cursor must be on the pane you wish to resize.To resize the width of a pane ctrl + a :Then type: resize -h 40This will resize the horizontal width of the pane to 40 characters.When resizing the height of a pane no flags need to be provided.To resize the height of a pane ctrl + a :Then type: resize 30This will resize the vertical height of your pane to 30 characters.You can also provide the unit of size as a percentage. This will be a percentage of the size of your terminal window or your screen in the case you are using a full-screen terminal.Percentage examples:To resize the width of a pane to 40 percent ctrl + aThen type: resize -h 40%To resize the height of a pane to 30 percent: ctrl + aThen type: resize 30%Note:I am aware that when I resize the horizontal width to 50% in the tutorial It doesn't split the screen equally down the middle. This is anartifact of the size and style of font used. Screen does accept percentage units and will split you terminal down the middle if you setthe horizontal width of a pane to 50%. Subscribe: youtube.com/user/linuxleech?sub_confirmation=1Blog: http://www.linuxleech.comTwitter: http://www.twitter.com/linuxleechFacebook: http://www.facebook.com/linuxleech
