command: compgen
purpose: it is a built-in command and it will show all available commands,
aliases and functions in our systems
syntax: compgen [option]
example:
1. To list all available commands in your system
$compgen -c
2. To count the commands available in the system
$compgen -c | wc -l
3. To list the available aliases
$compgen -a
4. To show all the bash built-in commands
$compgen -b
5. To show all the bash keywords
$compgen -k
6. To show available functions
$compgen -A
regards,
dhanasekar
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