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14 - Various commands

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To tell to the operating system where to look for the files, you can use the variable PATH. For example, to add a path you can write:

PATH=$PATH:/usr/games
export PATH

To synthesize a complex command in a simpler one, ypu can use alias. For example, to resume the command

ls -aF --color

in a simpler ls, you can write:

alias ls='ls -aF --color'

To insert a comment you can use the hash sign:

# This is a comment


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