Crucial Exams

CompTIA Server+ SK0-005 Practice Question

A Linux file server that normally runs nightly backups has suddenly stopped accepting new SSH sessions, and many interactive commands fail with the message:

bash: fork: Resource temporarily unavailable

When you run ps -eo pid,ppid,stat,cmd | head on the system console, you see hundreds of lines whose STAT column shows Z+. Attempting kill -9 <PID> on several of those PIDs has no effect-the entries remain in the process list.

Which of the following actions should you take first to restore normal operation?

  • Delete any stale *.pid files in /run and start the backup service again.

  • Raise kernel.pid_max to a higher value and run systemctl daemon-reload.

  • Identify and restart (or gracefully terminate) the parent process so that the zombie children are reaped by init.

  • Increase the per-user process limit with ulimit -u and restart the SSH daemon.

CompTIA Server+ SK0-005
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