Create 4 random passwords which contains no special characters and are 10 characters long:
cat /dev/urandom| tr -dc 'a-zA-Z0-9' | fold -w 10| head -n 4
Create 4 random passwords which
DO contains special characters and are
12 characters long:
$ cat /dev/urandom| tr -dc 'a-zA-Z0-9-_!@#$%^&*()_+{}|:<>?='|fold -w 12| head -n 4| grep -i '[!@#$%^&*()_+{}|:<>?=]'
I'm going to stick to lastpass though...