#!/bin/bash

# bash generate random alphanumeric string

#

# bash generate random  character alphanumeric string (upper and lowercase) and

NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w  | head -n )

# bash generate random  character alphanumeric string (lowercase only)

cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w  | head -n 

# Random numbers in a range, more randomly distributed than $RANDOM which is not

# very random in terms of distribution of numbers.

# bash generate random number between  and

cat /dev/urandom | tr -dc '0-9' | fold -w  | head -n  | head --bytes 

# bash generate random number between  and

NUMBER=$(cat /dev/urandom | tr -dc '0-9' | fold -w  | head -n  | sed -e 's/^0*//' | head --bytes )

if [ "$NUMBER" == "" ]; then

  NUMBER=

fi

# bash generate random number between  and

NUMBER=$(cat /dev/urandom | tr -dc '0-9' | fold -w  | head -n  | sed -e 's/^0*//' | head --bytes )

if [ "$NUMBER" == "" ]; then

  NUMBER=

fi