Random password generator.

On linux I greatly prefer to use pwgen.

openssl rand -base64 9

egrep -oam1 '[A-Za-z0-9]{8}' /dev/random

works much better for me.  Dropping the -i option and including A-Z in the regexp speeds it up alot.

< /dev/urandom tr -dc A-Za-z0-9_ | head -c10 | xargs | cat

There's a perl program that already does this called makepasswd.  To use:

makepasswd --chars=20

or you can even add it directly to a user:

usermod -p `makepasswd --chars=20` user

None of these work verbatim on Solaris 10.  In Solaris Land, "egrep" has no "o", "a", or "m" options and "head" has no "c" option.  Also, stock "egrep" doesn't support "{}".

Slight correction: the "openssl" trick does work.

strings -n8 /dev/urandom|head -1

Works on Solaris 8 too.

Use 'mkpasswd' Linux command with the required options.

'mkpasswd -l 8' should suffice here.
You can make it still complex using something like : mkpasswd -l 15 -d 3 -C 5 -s 3 -2

i have test in solaris 8 working :d