Due to security policies, a restriction was implemented that forbids direct access to the database server. The
junior administrator needs to connect using SSH tunneling. Which of the following commands allows the junior
administrator to connect from a desktop?

• A.ssh -L dbserver.local:5432:localhost:95432 [email protected]
• B.ssh -L 5432:localhost dbserver.local:5432 postgres
• C.ssh -L 9432:localhost:5432 [email protected]
• D.ssh -L 95432:localhost [email protected]

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A systems engineer scheduled an at job that will reboot a critical server. A developer states the processes will not complete for another three hours.
Which of the following will help the systems engineer to remove the job?

• A.at -q
  atrm <at job number>
• B.atq
  atrm <PID>
• C.atq
  atrm <at job number>
• D.at -q
  atrm <PID>

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A junior Linux administrator is optimizing a system in which an application needs to take priority 0 when running the process. The administrator runs the ps command and receives the following output:

Given this scenario, which of the following steps will address this issue?

• A.Issue the command renice -p 0 -n 8481
• B.Issue the command renice -p 8481
• C.Issue the command renice -n 8481
• D.Issue the command renice -n 0 -p 8481

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Which of the following files would a junior systems administrator check to verify DNS server settings?

• A./etc/network
• B./etc/hosts
• C./etc/rsolveconf
• D./etc/nsswitch,conf

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Which of the following configuration files should be modified to disable Ctrl-Alt-Del in Linux?

• A./etc/inittab
• B.~/.bash_profile
• C./etc/securetty
• D./etc/security/limits.conf

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