Enumerate users using finger service
$ ./finger_enum_user.sh
Script takes a file with a list of users as argument
Usage:
./finger_enum_user.sh <filename.txt>$ ./finger_enum_user.sh users.txt
User : user
Login: user Name: user
Directory: /home/user Shell: /bin/bash
Last login Tue May 16 01:47 (BST) on pts/0 from 192.168.1.34
No mail.
No Plan.
Login: dovenull Name: Dovecot login user
Directory: /nonexistent Shell: /bin/false
Never logged in.
No mail.
No Plan.
Check for the parameter "Directory:" in the output, if /home/username means that it is a valid user on the system.