Other necessery things

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In some commands can use {} for enumerate some information.
For example: cp /etc/fstab{,.orig} will create a copy of fstab named fstab.orig

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Open a new virtual terminal - Alt+Ctrl+F{1..3}

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Easy way to create backup file is a: cp .\file{,.bkp}

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$? - show exit code for last ran program.

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For use clipboard in vim accross the terminals, consider to install vim-gtk package, or use set:clipboard=unnamed options in .vimrc or specified file

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. $FILE_NAME run commands from file. Can be usefull to reread .bashrc

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For debian based systems, if PC have enabled Secure Boot, use intermediary bootloader called shim.

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For debian based systems aptitude it's like Synaptic but with CLI.

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.deb file it's just archive file, contain all files for the programm from the .deb package: binaries, libraries, pre/post install scripts, man pages and description of dependencies. because .deb file = archive, it can be open with any archive handle programs: tar, gz, bzip and so on

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meta-package - the type of a package which contain only meta files describe dependencies and not contain another files. When meta-package

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Для работы с rar есть unrar и unrar-free. Для debian живет в репозитории non-free

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