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alias

Creates aliases -- words that are replaced by a command string. Aliases expire with the current shell session, unless they're defined in the shell's configuration file, e.g. ~/.bashrc.

Create a generic alias:

alias {{word}}="{{command}}"

View the command associated to a given alias:

alias {{word}}

Remove an aliased command:

unalias {{word}}

List all aliased words:

alias -p

Turn rm into an interactive command:

alias {{rm}}="{{rm -i}}"

Create la as a shortcut for ls -a:

alias {{la}}="{{ls -a}}"