Shortcut for searching bash history using grep

h.sh

#! /bin/bash

function show_usage {
cat <<- _EOF_

Search Bash History using Grep

Examples:
    $ h ssh
    $ h 'ssh user@'

_EOF_
exit 1
}

#Sanity check - Need one argument
if [ $# -ne 1 ]; then
        show_usage
fi

#If bash_history doesn't exist
if [ ! -f ~/.bash_history ]; then
    show_usage
else
    cat ~/.bash_history | grep $1
fi

Alternatively, (But I don't think strictly needed)

#If bash_history doesn't exist
if [ ! -f /home/${USER}/.bash_history ]; then
    show_usage
else
    cat /home/${USER}/.bash_history | grep $1
fi