I'm new with Linux/ubuntu and need help doing these commands. They're access control exercises.

Descriptions and screenshots would be helpful.

Using umask: i. ii. ili. iv. Create a new file, observe its default permissions using Is-I. Type "umask 022" in the shell, create a second file, observe its permissions. Exit the shell, open a new shell window, and create a new file again; Modify.bashrc (in the root of the user's home directory) to include the umask 022 command; exit, restart the shell, and create a new file. Using a live CD 1. The mount command: 2. /etc/init .d/lvm2 sudo- cat /proc/partitions start 1s /dev/mapper/ mkdir /tmp/x mount /dev/mapper /whatever-its-called 1s /tmp/x/ see what exists create a mountpoint /tmp/x t see whats there mount it Limiting root (superuser) a. Su b. Sudo c. Wheel group- add Eve to the wheel group d. /etc/sudoers e.Examining logs for sudo attempts