addacl is a synonym for
This command only applies in multiuser mode.
acladd usernames [crypted-pw]
addacl usernames [crypted-pw]
Enable users to fully access this
screen session. usernames can be one user or a comma separated list of users. This command allows other users to attach to the screen session and performs the equivalent of
aclchg usernames +rwx ”#?”. To add a user with restricted access, use the ''aclchg' command. If an optional second parameter is supplied, it should be a crypted password for the named user(s). only.