aliases and functions define things that act like commands; export marks a variable to be exported to child processes.

answer re: What is the difference between alias and export (and a function!)[BASH]?

Apr 19 '14

31

You're asking about two very different categories of things: aliases and functions define things that act like commands; export marks a variable to be exported to child processes. Let me go through the command-like things first:

An alias (alias ll='ls -l') defines a shorthand for a command. They're…

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