Uploaded October 2012 | Updated September 2026, 2 weeks ago
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By suphalb@techytube, for more from this author visit:
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For an administrator it is one of the important task is managing services on your Linux Server. These 2
parts of videos will demonstrate you how to manage and maintain your required linux services on specific runlevel with immediate and permanent effect. Also it would show you how to add or delete any services to the linux kernel service list.
Thanks for watching.
TechyTube Team
Subscribe to our channel here for notifications on new video trainings. For more videos on technology, visit our website at http://www.techytube.com.
By suphalb@techytube, for more from this author visit:
techytube.com/author/suphalb
For an administrator it is one of the important task is managing services on your Linux Server. These 2
parts of videos will demonstrate you how to manage and maintain your required linux services on specific runlevel with immediate and permanent effect. Also it would show you how to add or delete any services to the linux kernel service list.
Thanks for watching.
TechyTube Team






![Working with paths and urls in Objective-C
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By pavel@techytube, for more from this author visit:
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When working with files in Objective-C, we can specify the paths to them as follows:
NSString *path = @/Users/pavel/file.txt;
However, the recommended way (by Apple engineers) to specify that is by using URL-s (Uniform Resource Locator).
The iOS SDK class that provides us urls manipulation is named NSURL, and it has a lot of class convenience methods that make developers lives easier.
To create a NSURL object, we use the syntax:
NSURL *url = [NSURL URLWithString:@file:///Users/pavel/file.txt];
Note that the way we specify the string is different from in path cases.
It should always have the file schema in front of it, than a colon, and 3 slashes.
If we want to create a NSURL object, providing a string as in path cases, we can use a NSURL method which allows us to do that:
NSURL *newUrl = [NSURL fileURLWithPath:@/Users/pavel/Public/file.txt];
To move files from one location to another using urls instead of paths, we should use:
[[NSFileManager defaultManager] moveItemAtURL:url toURL:newUrl error:nil]; Working with paths and urls in Objective-C](https://i.ytimg.com/vi/xix_7Nqa7qM/mqdefault.jpg)


![How to use the UIImageView class to animate a series of images
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By pavel@techytube, for more from this author visit:
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An image view object provides a view-based container for displaying either a single image or for animating a series of images. For animating the images, the UIImageView class provides controls to set the duration and frequency of the animation. You can also start and stop the animation freely.
You specify the animation images by setting the animationImages property of the UIImageView object:
imageView.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:@blue],
[UIImage imageNamed:@green],
[UIImage imageNamed:@orange],
nil];
We specify the duration of the animation by setting the animationDuration property:
imageView.animationDuration = 3.0f;
We can start or stop animating the images by sending startAnimating or stopAnimating messages to the image view object:
[imageView startAnimating];
or
[imageView stopAnimating];
All images associated with a UIImageView object should use the same scale. If your application uses images with different scales, they may render incorrectly.
For more details, please visit Apples Online Documentation at:
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIImageView_Class/Reference/Reference.html How to use the UIImageView class to animate a series of images](https://i.ytimg.com/vi/yEbid5QUemY/mqdefault.jpg)
