102-400 Questions and Answers

In which file, if present, must all users be listed that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)

Each entry in a crontab must end with what character?

Which of the following is observed and corrected by a NTP client?

What is the purpose of the file /etc/profile?

By default, the contents of which directory will be copied to a new user's home directory when the account is created by passing the -m option to the useradd command? (Specify the full path to the directory.)

On a Linux system with shadow passwords enabled, which file in the file system contains the password hashes of all local users? (Specify the full name of the file, including path.)

Which of the following commands puts the output of the command date into the shell variable mydate?

Which command is used to sync the hardware clock to the system clock? (Specify ONLY the command without any path or parameters.)

With X11 forwarding in ssh, what environment variable is automatically set in the remote host shell that is not set when X11 forwarding is not enabled? (Specify only the environment variable without any additional commands or values.)

The presence of what file will temporarily prevent all users except root from logging into the system? (Specify the full name of the file, including path.)

What is true regarding a default route?

How many IP-addresses can be used for unique hosts inside the IPv4 subnet 192.168.2.128/28? (Specify the number only without any additional information.)

On a regular users workstation the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?