Linux-Dom4-Practice

Which of the following commands produced the following output?

06:14:11 up 139 days, 24 min, 5 users, load average: 0.12, 0.33, 0.48

• ps

• top

• uptime

• w

A technician executes a command that collects various OS usage statistics, provides report capability, and saves system activity information. Which of the following commands displays this information?

• free

• vmstat

• iostat

• sar

A user is trying to access a system using SSH but can't connect. The user has verified the correct hostname and IP address. Which of the following should the user check to troubleshoot the issue?

• Confirm that access is available for all virtual terminals.

• Check the firewall to see if the default SSH port 22 is blocked.

• Check whether the SSH daemon is running.

• Verify that the vncd.services is running and listening on the default port.

• Check that encryption is not enabled on the local SSH client.

The current default boot target is a multi-user.target, but you want to use this system as a desktop workstation. You need a boot target that supports multiple users, supports networking, and has a graphical display. This is a systemd system. What command should you enter to change the default boot target to one that meets these needs?

• systemctl set-default graphical.target

• systemctl set-default multi-user.target

• systemctl set-default rescue.target

• systemctl set-default network.target

Which of the following sar commands can you use to view statistics for each processor and global statistics for all processors?

• sar -P

• sar -P ALL

• sar -o

• sar -f

Which of the following commands is useful when trying to troubleshoot user file access issues?

• pwd

• ls

• touch

• ls -l

You are troubleshooting a file access issue for an employee and want to view some ACL assignments. Which command would you use to view these ACL assignments?

• ls

• chmod

• getfacl

• setfacl

Which command should you enter at the command prompt to change the quota settings for the gshant user?

• edquota -u gshant

• quota gshant

• setquota gshant

• repquota gshant

You are on a systemd system. Without rebooting the system, which command should you enter to change from the currently running target unit to a target that supports networking, supports multiple users, and displays a graphical interface?

• systemctl isolate multi-user.target

• systemctl isolate rescue.target

• systemctl isolate graphical.target

• systemctl isolate network.target

Which of the following commands will display the boot options that were given to the kernel at boot time?

• cat /proc/mounts

• cat /proc/modules

• cat /proc/cmdline

• cat /proc/version