Chapter 2
System Operations and Maintenance (Domain 2.0)

1. You need to delete a user from the system, including their home directory. Which of the following utility commands accomplishes this task?
   1. userdel
   2. userdel -r
   3. userdel -R
   4. deluser
2. You need to enable the web server (running as the www-data user and group) to write into a directory called /home/webfiles. Which commands will accomplish this task in the most secure manner?
   1. chgrp www-data /home/webfiles ; chmod 775 /home/webfiles
   2. chmod 777 /home/webfiles
   3. chgrp www-data /home/webfiles ; chmod 711 /home/webfiles
   4. chmod 707 /home/webfiles
3. Assume that passwords must be changed every 60 days. Which command will change the date of the user's last password change without the user actually changing the account password?
   1. chage -f
   2. chage -W
   3. chage -l
   4. chage -d
4. What is the order in which user configuration files are located on login to a Bash shell?
   1. .bash_login, .profile, /etc/profile
   2. .bash_profile, .bash_login, .profile
   3. .profile, .bash_login, .bash_profile
   4. .bash_login, .bash_profile, .profile
5. Within which directory should you place files to have them automatically copied to a user's home directory when the user is created?
   1. /etc/userhome
   2. /etc/templateuser
   3. /etc/skel
   4. /home/skel
6. Which bash parameter or option will cause the shell to be executed without reading the initialization files?
   1. --no-rc
   2. --no-init
   3. --norc
   4. --rc-none
7. You need to create a function that will be available each time you log in to the system. Within which file should this function be placed?
   1. .bash_profile
   2. .rc
   3. /etc/profile
   4. .bash_run
8. Assuming X forwarding has been enabled on the SSH server, which environment variable is used to set the location for newly spawned windows from within an SSH session?
   1. DISPLAY
   2. XTERMINAL
   3. XTERM
   4. XDISP
9. Which of the following options in the SSH configuration file needs to be enabled so that X sessions can be sent over an SSH connection?
   1. X11Connect yes
   2. X11Forwarding yes
   3. ForwardX yes
   4. XForward yes
10. Which file contains user information such as username and real name and is readable by all users of the system?
    1. /etc/pass
    2. /etc/shadow
    3. /etc/passwd
    4. /etc/userinfo
11. Which of the following commands changes a group called DomainAdmins to DomainUsers?
    1. groupmod -n DomainUsers DomainAdmins
    2. groupchg DomainAdmins DomainUsers
    3. chgroup DomainAdmins DomainUsers
    4. group -N DomainAdmins DomainUsers
12. When running useradd, which option needs to be specified in order for the user's home directory to be created?
    1. -h
    2. -m
    3. -x
    4. -a
13. Which of the following commands locks out password-based login for a user but does not prevent other forms of login?
    1. usermod -L
    2. userdel -r
    3. useradd -h
    4. userlock
14. Which of the following commands produces a report listing the last password change date for all users on the system?
    1. passwd -a
    2. passwd -S
    3. passwd -a -S
    4. passwd --all
15. Which file contains a list of usernames, UIDs, and encrypted passwords?
    1. /etc/passwd
    2. /etc/shadow
    3. /etc/encpass
    4. /etc/grouppass
16. Which command is used to change a user's home directory to /srv/data/username and move the contents at the same time?
    1. usermod -d /srv/data/username -m
    2. homedir -m /srv/data/username
    3. userex -m /srv/data/username
    4. userchg /m /srv/data/username -d
17. Which option to useradd will add groups for a user?
    1. -g
    2. -x
    3. -l
    4. -G
18. Which option to useradd creates a system user rather than a normal user?
    1. -r
    2. -s
    3. -a
    4. -S
19. Which file contains encrypted password information for groups?
    1. /etc/group
    2. /etc/gshadow
    3. /etc/gsecure
    4. /etc/group.conf
20. Which of the following best describes a valid use of the groupdel command?
    1. You may force group deletion with the -f option.
    2. If a user's primary group is to be deleted, that user must be deleted first or have their primary group changed.
    3. Groupdel can be run at any time, regardless of group membership.
    4. The -r option for groupdel will recursively change users' GIDs after group deletion.
21. Which of the following commands displays the UID, primary group, and supplemental groups for a given user?
    1. id
    2. getid
    3. passwd
    4. chage
22. Which option to the usermod command is used to change a given user's real name?
    1. -R
    2. -n
    3. -d
    4. -c
23. A user needs to work with printers and printer-related items. Which of the following commands adds the user (called username in the options) to the appropriate group for this purpose?
    1. usermod -aG printerusers username
    2. usermod -aG lpadmin username
    3. usermod -gA lpadm username
    4. usermod -a lpadm username
24. You need to examine who is currently logged in to the system. Which of the following commands will display this information?
    1. listuser
    2. fuser
    3. ls -u
    4. w
25. Within the following entry in /etc/shadow, to what does the number 15853 refer? mail:*:15853:0:99999:7:::
    1. The UID of the mail user
    2. The number of files owned by mail
    3. The date of the last password change (since 1/1/1970)
    4. The number of days until the account expires
26. Which of the following commands displays a listing of who is logged in to the server along with the date and time that they logged in?
    1. whois
    2. who
    3. loggedin
    4. curusers
27. Which of the following commands adds a group?
    1. groupadd
    2. addgrp
    3. grpadd
    4. creategroup
28. Which of the following commands enables the sticky bit for a user on a file called homescript.sh?
    1. chmod +sticky homescript.sh
    2. chmod 755 homescript.sh
    3. chmod u+t homescript.sh
    4. chown u+sticky homescript.sh
29. The umask reports as 022. What is the permission that will be in effect for a newly non-executable created file?
    1. u+rw, g+r, w+r
    2. 755
    3. 644
    4. a+r
30. Which of the following best describes the relationship between UIDs and GIDs on a Linux system when an authentication server is being configured?
    1. The UID and GID are the same across the system for a given user.
    2. Each user has a UID and GID that are the same and are created when the user is created.
    3. The UID represents the user, while the GID is a globally unique user ID.
    4. There is no direct relationship between UID and GID.
31. When you're configuring a server for an SNMP server role, which ports need to be allowed through the firewall for SNMP traffic?
    1. Ports 23 and 25
    2. Ports 110 and 143
    3. Ports 80 and 443
    4. Ports 161 and 162
32. You need to look at information on logins beyond what was captured by the current log file for the last command. Which option to the last command can be used to load information from an alternate...