show command bash - will check aliases, functions and commands

show.bash

function show
{
    # Show the definition of the verb given in $1 e.g. `show ll` (alias) or                                                         
    # `show show` (function) or `show who` (command).                                                                               
    verb=$1

    alias $1 2>/dev/null                        \
        || declare -f $1 2>/dev/null            \
        || /usr/bin/which $1 2>/dev/null        \
        || echo "Unrecognized command '$1'"
}