How to give a new user access to the test machines?
$ echo NewUser >> /home/ot1/users $ echo NewUser >> /home/ot2/users $ echo NewUser >> /home/ot3/users ...
$ doas /home/test/bin/keyrollout.sh renew /home/ot1/.ssh/authorized_keys user1 user2 NewUser renew /home/ot2/.ssh/authorized_keys user1 user2 NewUser renew /home/ot3/.ssh/authorized_keys user1 user2 NewUser renew /home/ot4/.ssh/authorized_keys user1 user2 ...