Lab 9: User and Group Accounts

1. Login to your user account and su to root. Then run the below command: a. What user ID does Student have? What is Students login shell and home directory?

b. Click on the Groups tab. What is Students Group ID and group name and what members are in that group?

c. Go back to the Users tab, click Add User. Fill in the following: User Name: marst. Full Name: Tommy Mars. Enter and confirm a password (any password, if the password is too weak, use it anyway), leave login shell and home directory as the defaults, leave private group box checked, use the default for user ID. Click OK. A new user will appear in the User Manager window. What is this users ID?

d. Highlight user marst, click Properties to change info on the user. There are four tabs: user data, account info, password info, and groups. Click on each to explore them. To set password expiration information, first click on the Enable password expiration checkbox. To add this user to a group, you just check any group you wish in the list under the Groups tab. While marsts user properties window is open, expire marsts password tomorrow. How did you accomplish this? Close the properties window.

e. In your terminal window, type ls /home/marst. What was output? Why? su to root. Redo the ls command. No files. Type ls al /home/marst. What do you find there? Obviously you did not create these files, so how did these files get created?

f. As root type passwd marst to change his password to keys and confirm it (note that you are not asked for the original password!) What warning did you get? If you just typed passwd without marst, you would be changing roots password, so be careful!

g. Type su marst (you are not asked to enter a password because root can switch to any user!). Type exit to switch back to root and exit again to switch back to your profile. Type su marst. Enter the password (keys). Type whoami. What was displayed? Type exit. Who are you now?

h. Switch to the Group tab in the User Manager GUI. There are already 5 groups, one for each user. These are private groups. What is a private group? Why were they automatically created for users? Create a new group, cit371. Select the new group and select Properties. From the Properties window, click the Group Users tab and check the box for yourself to add your account to the group. Close the group properties, switch back to the Users tab, select marst and select Properties. Click on the Groups tab and select cit371. Click back on the Groups

yum install system-config-users

After installation run the command system-config-users from your terminal. User Manager window will open.

You should find four accounts: your account (from lab 0), Student, foxr, zappaf.

tab you should see two users added to the cit371 group. Create another group called informatics. How did you do this? Leave its membership blank for now. Close the User Manager GUI. Attach the screenshots here.

Su to root for the remainder of the lab except as noted.

2. You will create users and groups through the command line using useradd and groupadd. Both programs are in /usr/sbin, which should be in your PATH; if not, you will have to specify the full path in the commands. a. Type useradd and create an account for Ruth Underwood giving her name as a comment, add her to the group cit371, and give her an username of underwoodr. What command did you enter? Use the passwd command to give her an initial password of xylophone. What warning message did you get because of the password?

b. Use groupadd to create two groups: students and minjas. What commands did you enter? Now create the group dummies and give the group the GID of 2000. What command did you enter?

c. Create the following users with the given names and usernames and use the defaults for everything else except as noted. Place the instruction used into your answers. i. Suzie Creamcheese, creamcheeses (username), default login shell /bin/tcsh

ii. Eric Cartman, cartmane (username), groups cit371 and informatics, UID of 1001 (user ID may not be unique, if not then fix the issue and make sure that multiple users can share the same user ID!!

iii. )

iv. CIT 371 Student, cit371 (username). What error dig this give you? To fix the problem, create the account with no private group.

d. Use the passwd to give the three users from c initial passwords of xyz12abc, cheesypoofs and a password of your own making respectively. What warnings did each give you if any?

e. Use userdel to delete marst. What command did you enter? Use userdel to delete creamcheeses but leave creamcheesess home directory. What command did you enter? Type ls /home, of marst andcreamcheeses, do either still have a directory?