random number/ character generator

[threegremlins]

what software could i use to output a file of random numbers and characters?

[Bachstelze]

Define "random". In particular, what is it for?

[HansKisaragi]

http://www.random.org/ .. Not sure about software but there some random generators on that site.

[Phoenixie]

cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 50 | head -n 1

[HermanAB]

Read either /dev/random or /dev/urandom.

$ cat /dev/random

[threegremlins]

Phoenixie, that is perfect. Yes I read about random, rand and urand but I didn't understand about the options. thanks every one.