QUESTION: 125

A Linux systems administrator receives a notification that one of the server’s filesystems is full. Which of the following commands would help the administrator to identify this filesystem?

lsblk
fdisk
df -h
du -ah

Answer(s): C

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A systems administrator is notified that the mysqld process stopped unexpectedly. The systems administrator issues the following command:
sudo grep –i -r ‘out of memory’ /var/log
The output of the command shows the following:
kernel: Out of memory: Kill process 9112 (mysqld) score 511 or sacrifice child.
Which of the following commands should the systems administrator execute NEXT to troubleshoot this issue? (Select two).

free -h
nc -v 127.0.0.1 3306
renice -15 $( pidof mysql )
lsblk
killall -15
vmstat -a 1 4

Answer(s): A,F

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QUESTION: 127

Users have reported that the interactive sessions were lost on a Linux server. A Linux administrator verifies the server was switched to rescue.target mode for maintenance. Which of the following commands will restore the server to its usual target?

telinit 0
systemctl reboot
systemctl get-default
systemctl emergency

Answer(s): B

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QUESTION: 128

A systems administrator was tasked with assigning the temporary IP address/netmask 192.168.168.1/255.255.255.255 to the interface eth0 of a Linux server.
When adding the address, the following error appears:
# ip address add 192.168.168.1/33 dev eth0
Error: any valid prefix is expected rather than "192.168.168.1/33".
Based on the command and its output above, which of the following is the cause of the issue?

The CIDR value /33 should be /32 instead.
There is no route to 192.168.168.1/33.
The interface eth0 does not exist.
The IP address 192.168.168.1 is already in use.

Answer(s): A

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QUESTION: 128

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