XK0-004 Commands Practice Questions

A Linux administration is using a Linux system as a router. During the tests, the administrator discovers that IP packets are not being sent between the configured interfaces. Which of the following commands enables this feature for IPv4 networks?

• AA. cat /proc/sys/net/ipv4/ip_route > 1
• BB. echo “1” > /proc/sys/net/ipv4/ip_forward
• CC. echo “1” > /proc/sys/net/ipv4/ip_route
• DD. echo “1” > /proc/sys/net/ipv4/ip_net

A systems administrator needs to append output of ls –lha /opt command to the contents of a test.txt file. Which of the following commands will accomplish this?

• AA. ls –lha /opt > test.txt
• BB. ls –lha /opt < test.txt
• CC. ls –lha /opt >> test.txt
• DD. ls –lha /opt << test.txt

A systems administrator wants to know the current status of a series of dd jobs that were started in the background three hours ago. Which of the following commands will achieve this task?

• AA. sudo killall –HUP dd
• BB. sudo killall dd
• CC. sudo killall –TERM dd
• DD. sudo killall -USR1 dd