list all possible commands code example

Example 1: check command list

compgen -c	#In Unix
help | more	#In Windows

Example 2: linux get available commands

compgen -c will list all the commands you could run.
compgen -a will list all the aliases you could run.
compgen -b will list all the built-ins you could run.
compgen -k will list all the keywords you could run.
compgen -A function will list all the functions you could run.