This lab introduced me to user, group, and permission management in Linux. I created multiple groups and user accounts, assigned primary and secondary groups, and configured login shells and passwords for each user. I also set up a shared directory with specific group ownership and permissions, then tested how access changes when copying and accessing files between users. A challenge was correctly managing permissions and understanding how group membership and file ownership affected access, particularly how group and user permissions interact. Overall, it helped me understand how Linux controls file security through users, groups, and directory permissions.