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.)

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 a...

What argument to the -type option of find will match files that are symbolic links? (Specify only the argument and no other options or words.)

In an xinetd configuration file, which attribute specifies the network address that will be used to provide the service?

Which keyword must be listed in the hosts option of the Name Service Switch configuration file in order to make host lookups consult the /etc/hosts file?

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? A. The local routing information may be cor...

Which of the following keywords can be used in the file /etc/resolv.conf? (Choose TWO correct answers.) A. substitute B. nameserver C. search D. lookup E. method

What of the following can be done by the command ifconfig? (Choose TWO correct answers.) A. Set a network interface active or inactive. B. Specify the kernel module to be used with a network interfac...

Which of the following is a valid IPv6 address? A. 2001:db8:3241::1 B. 2001::db8:4581::1 C. 2001:db8:0g41::1 D. 2001%db8%9990%%1 E. 2001.db8.819f..1

How would an outgoing packet to the destination 192.168.2.150 be handled? A. It would be passed to the default router 192.168.178.1 on wlan0. B. It would be directly transmitted on the device eth0. C...