A systems administrator needs to run the yum update command two hours after employees log off and leave for the day on Friday.
Which of the following is the BEST command to complete the task, if the task only needs to be run once?

• A.screen
• B.cron
• C.at
• D.nohup

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A systems administrator is implementing disk quotas on /home. During the process, the administrator receives the following error:
Cannot find filesystem to check or filesystem not mounted with user quota option.
Which of the following is the correct order of steps the administrator should follow to resolve this error?

• A.1. Verify if /home has quotas enabled in /etc/fstab and, if not, enable it.
  2. Remount /home.
  3. Create the quota database files and generate the disk usage table.
  4. Assign user quota policies.
• B.1. Create the quota database files and generate the disk usage table.
  2. Verify if /home has quotas enabled in /etc/fstab and, if not, enable it.
  3. Remount /home.
  4. Assign user quota policies.
• C.1. Verify if /home has quotas enabled in /etc/fstab and, if not, enable it.
  2. Create the quota database files and generate the disk usage table.
  3. Remount /home.
  4. Assign user quota policies.
• D.1. Assign user quota policies.
  2. Verify if /home has quotas enabled in /etc/fstab and, if not, enable it.
  3. Create the quota database files and generate the disk usage table.
  4. Remount /home.

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A four-drive Linux NAS has been improperly configured. Each drive has a capacity of 6TB, for a total storage capacity of 24TB. To reconfigure this unit to be not pluggable for drive replacement and provide total storage of 11TB to 12TB, which of the following would be the correct RAID configuration?

• A.RAID 03
• B.RAID 10
• C.RAID 50
• D.RAID 01

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A server is almost out of free memory and is becoming unresponsive. Which of the following sets of commands will BEST mitigate the issue?

• A.free, fack, partprobe
• B.df, du, rmmod
• C.lsof, lvcreate, mdadm
• D.fdisk, mkswap, swapon -a

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A junior systems administrator needs to make a packet capture file that will only capture HTTP protocol data to a file called test.pcap.
Which of the following commands would allow the administrator to accomplish this task?

• A.tcpdump -i eth0 port 80 -w test.pcap
• B.tshark -r test.pcap -o http
• C.netcat -p 80 -w test.pcap
• D.tcpdump -i eth0 port 80 -r test.pcap

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