Alias
The alias mechanism allows you to define new commands by letting you substitute any string for any command. The syntax of the alias builtin is
alias [name[=value]]
or
alias [name[ value]]
There are no SPACEs around the equal sign 
. If value contains SPACEs or TABs, you must enclose value between quotation marks. The alias mechanism is disabled for noninteractive shells (that is, shell scripts).
An alias cannot be recursive: The name of the alias ...
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