`comment`: `` :: Comment. `crypt_pass`: `\$\d\$[a-zA-Z0-9\.\/]+\$[a-zA-Z0-9\.\/]+` :: Encrypted password (see `man crypt`) `email`: `` :: Users E-Mail address. `enable`: `` ('default =' `0`):: Flag to enable or disable the account. `expire`: ` (0 - N)` ('default =' `0`):: Account expiration date (seconds since epoch). '0' means no expiration date. `firstname`: `` :: First name. `keys`: `` :: Keys for two factor auth (yubico). `lastname`: `` :: Last name. `password`: `` :: Password `role`: `` :: User role. Role 'root' is reserved for the Unix Superuser. `userid`: `` :: User ID