$ sudo apt install apg
$ apg -n 1 -s
$ apg -n 1 -a 1 -m 12 -x 20 -s
$ sudo apt-get install pwgen
$ pwgen
$ sudo apt-get install makepasswd
$ makepasswd -chars 8
$ dd if=/dev/urandom bs=1 count=10 2>/dev/null | base64 or date +%s | sha256sum | base64 | head -c 16 ; echo or date | md5sum