Simple explanation
Show all available commands, aliases and functions
whatis
compgen [builtins] (1) - bash built-in commands, see bash(1)
help
compgen: usage: compgen [-abcdefgjksuv] [-o option] [-A action] [-G globpat] [-W wordlist] [-F function] [-C command] [-X filterpat] [-P prefix] [-S suffix] [word]
man
man 1 bash
Usage
How are we going to create a list of commands for ‘Command of the Day’? Compgen!
compgen
- -a: List of user aliases
- -b: List of built-in shell commands
- -c: List of all commands you can run
- -e: List of shell variables
- -k: List of built-in shell keywords
- -A function: List of available bash functions
Tip
Create an alias for compgen to show all functions: alias compgen=‘compgen -abckA function’. This will print in list format including all aliases, built-ins, commands and functions available
References
