Why is /etc/shadow not world readable if the passwords are stored in an encrypted fashion?
A. The encrypted passwords are still subject to brute force attacks.
B. This is just for historical reasons.
C. There is other information in the file that needs to be kept secret.
D. The passwords can be decrypted by anyone with root access.
Which command will set the local machine's timezone to UTC?
A. cat UTC > /etc/timezone
B. ln -s /usr/share/zoneinfo/UTC /etc/localtime
C. date --timezone=UTC
D. mv /usr/timezone/UTC /etc
Which commands can be used to change a user's account aging information? (Choose THREE correct answers.)
A. usermod
B. passwd
C. chattr
D. chage
E. chsh
Each entry in a crontab must end with what character?
A. Tab
B. Space
C. Backslash
D. Newline
Which command can be used to delete a group from a Linux system?
A. groupdel
B. groupmod
C. groups
D. groupedit
What is the main difference between the batch and at commands?
A. The batch command will run multiple times.The at command will only run once.
B. The batch command will run when system load is low. The at command runs at a specific time.
C. The at command reads commands from standard input. The batch command requires a command line argument.
D. The at command e-mails results to the user. The batch command logs results to syslog.
Which of the following commands can be used to convert text files in one character encoding to another character encoding?
A. cat
B. convert
C. dd
D. iconv
E. utf2utf
A French user has installed the French language pack, but currencies are still being displayed with a leading '$' sign in his spreadsheets. What must be done to fix this?
A. Alter the locale.
B. Set the timezone correctly.
C. Edit /etc/currency.
D. Reinstall the French language pack.
Which character in the password field of /etc/passwd is used to indicate that the encrypted password is stored in /etc/shadow?
A. *
B.
C. s
D. x
Which of the following steps prevents a user from obtaining an interactive login session?
A. Run the command chsh -s /bin/false with the user name.
B. Set the UID for the user to 0.
C. Remove the user from the group staff.
D. Add the user to /etc/noaccess.
E. Create a .nologin file in the user's home directory.
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