Last Updated on October 17, 2019 by
Which files contain user account information?
(choose two)- /etc/shadow
- /etc/group
- /etc/passwords
- /etc/passwd
Which user can view the /etc/shadow file?
- Any member of the password group
- No users
- The root user
- All users
Which command will display the UID, GID and groups your current user belongs to?
- whoami
- Who
- id
- about
Each user belongs to at least one group.
True or False?
- True
- False
Which command will display the users that are currently logged in to the system?
- about
- who
- id
- whoami
The sudo command allows regular users to…
- …execute commands as another user.
- …execute any command as root, after providing the root password.
- …run any command as root, after providing the sudo password.
- …run any commands as a system account without logging in.
Which of the following commands will display the group(s) a user belongs to?
- all
- id
- whoami
- group
Which of the following commands will display the groups that the user bob belongs to?
- group bob
- id bob
- groups -a
- all bob
The /etc/group file follows what structure?
- group:GID:user_list
- groups -a
- user:group
- group_name:password_placehoder:GID:user_list
A GID is associated with a group name.
True or False?
- True
- False
A user can belong to…
- At least 16 groups
- Only five groups
- Only groups with a GID over 500
- Only one group
Sudo privileges can be used to specify which user can use the sudo command to execute commands as other users.
True or False?
- True
- False
In distributions that do not allow the root user to login directly or via the su command, the installation process automatically configures one user account to be able to use the sudo command to execute commands as if they were executed by the root user.
True or False?
- True
- False
Which of the following commands will display how long the system has been running since the last boot?
(choose two)
- who
- id
- uptime
- w
The /etc/shadow file contains plain-text passwords.
True or False?
- True
- False
Which command can be used to view the /etc/passwd file entries?
- uptime
- uppasswd
- getpasswd
- getent
All Linux systems allow administrators to log in as root.
True or False?
- True
- False
What is the default user for the su command?
- All users
- The root user
- Any member of the password group
- The most recently created user
Which command would allow a user to execute commands as root?
- whoami
- about
- sudo
- who
- grep
File permissions cannot be edited by the root user.
True or False?
- True
- False
Which command is used to display only the user’s primary group?
- who
- id -g
- man
- whoami
- about
Traditional UNIX systems allowed users to belong to how many groups?
- 10,000
- 1
- 65,000
- 256
- 16
What would an account with the UID 376 typically be used for?
- White hat hackers.
- Temporary employees.
- New users with full privileges.
- System service access.
- Root user access.
Usernames cannot be the same as group names.
True or False?
- True
- False
To display the group(s) a user belongs to use this command:
- all
- id
- grep
- group
- whoami
Which command will display the groups that the root user belongs to?
- all -t
- groups -a
- id root
- all
- group -r
A value of 0 in the “minimum” password aging field means the user cannot change their password.
True or False?
- True
- False
The “Epoch” began on January 1, 1970.
True or False?
- True
- False
The last command displays reboot records…
- By default
- Never
- Only when issued by the root user
- After restarting the system
- When issued with the -p switch
Sudo privileges allow users to execute commands as another user.
True or False?
- True
- False
When using the sudo command to execute a command as the root user, the command prompts for the user’s own password, not that of the root user.
True or False?
- True
- False
The first line of this command displays how long the system has been running since being rebooted.
- su
- getent
- w
- id
- who
The /etc/shadow file contains encrypted passwords.
True or False?
- True
- False
Which command can be used to view the /var/log/wtmp file entries?
- getent
- uptime
- getpasswd
- uppasswd
- last
Which command can be used to display user IDs and group IDs?
id Command
id is a simple command line utility for displaying a real and effective user and group IDs as follows.
Which of the following will show account aging information for a user such as the date of the last password change?
The chage command is used to modify user password expiry information. It enables you to view user account aging information, change the number of days between password changes and the date of the last password change.
What command would reveal the most information about groups that a user named Bob belongs to?
To display the group(s) a user belongs to use this command:
grep. group. whoami.
Which of the following is a special group that provides its members with the ability to run the su and sudo command?
The group wheel is a special user group to control access to the su or sudo command. By design, members of the group wheel can run all commands with sudo as root . The following procedure explains how to add a user account to the wheel group.