#!/bin/bash

# Generate random password string from all printable, non-space
# characters, using passed argument for number of characters,
# defaulting to a 16-character string. For example:
#   $ randpw
#   XC6Jo]2fj&f4E45n
#   $ randpw 24
#   :U)#J]b5[0mg)Wp@M\)l`$\y

function randpw() {
    tr -dc '[:graph:]' < /dev/urandom \
        | head -c ${1:-16}
    echo
}

randpw ${1}