File permissions

To view the files owned by the group "test" and user "luser' use FIND command
 
1. Find all the groups available on your system:


    cat /etc/group |cut -d: -f1


2. For finding the groups that the current user belongs to:


    groups luser test adm cdrom sudo dip plugdev lpadmin sambashare


3. For finding groups user luser belongs to:


    groups luser 
    luser : test luser adm cdrom sudo dip plugdev lpadmin sambashare


4. Now to see the files owned by group "test" in particular path or folder. Try


    find /home -group test

    find /etc -group root

5. To see all the users in the system:

    compgen -u

6. To see all the groups in the system:

    compgen -g