enum4linux

Verbose mode, shows the underlying commands being executed by enum4linux

enum4linux -v target-ip

Do Everything, runs all options apart from dictionary based share name guessing

enum4linux -a target-ip

Lists usernames, if the server allows it - (RestrictAnonymous = 0)

enum4linux -U target-ip

If you've managed to obtain credentials, you can pull a full list of users regardless of the RestrictAnonymous option

enum4linux -u administrator -p password -U target-ip