Linux command to list all available commands and aliases

Question

Is there a Linux command that will list all available commands and aliases for this terminal session?

As if you typed \'a\' and pressed tab, but for every letter of

Answer 1

Here's a solution that gives you a list of all executables and aliases. It's also portable to systems without xargs -d (e.g. Mac OS X), and properly handles paths with spaces in them.

#!/bin/bash
(echo -n $PATH | tr : '\0' | xargs -0 -n 1 ls; alias | sed 's/alias \([^=]*\)=.*/\1/') | sort -u | grep "$@"

Usage: myscript.sh [grep-options] pattern, e.g. to find all commands that begin with ls, case-insensitive, do:

myscript -i ^ls