Uploaded August 2017 | Updated September 2026, 2 weeks ago

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What is the command-line completion (also know as tab completion)?
When you type a command you can press the Tab key, and the terminal will complete that command. It simplifies the use of the command line a lot. In this video you will learn how to use the tab completion and how to enable it.

Also, watch how to enable colors in terminal youtu.be/giAb4Ckh8BQ

If tab completion doesn't work for sudo, edit the ~/.bashrc file by addin this line to it:

complete -cf sudo

Or install the bash-completion package.

In Arch Linux:
sudo pacman -S bash-completion

In Ubuntu, Debian and Debian-based distros:
sudo apt install bash-completion

In Debian and Debian-based distro, bash-completion sometimes doesn’t work. You need to check your .bashrc file.
It should have this content there

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if ! shopt -oq posix; then
if [ -f /usr/share/bash-completion/bash_completion ]; then
. /usr/share/bash-completion/bash_completion
elif [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi
fi

If it doesn’t have it, add it at the end of the file.

To reinstall:
sudo apt install bash-completion --reinstall

If you liked the Linux Mint theme, watch this video to install this theme youtu.be/osA-ZEEz6Zw


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