generate random password (hex or alphanumeric)

rpass

#!/bin/bash

# generate a random password from /dev/urandom
# usage: rpass <pwlength> <number_of_passwords> <h for hex>

alnum="[:digit:][:alpha:]"
hex="a-f[:digit:]"

if [ "${3}" == "h" ]; then
    pwtype=$hex
else
    pwtype=$alnum
fi

env LC_CTYPE=C tr -dc $pwtype < /dev/urandom | fold -w ${1:-32} | head -n ${2:-1}