c41-6b88-4f85-9e39-c763bed0d726","slug":"a-database-container-crashes-repeatedly-the-administrator-w-hh7p6","questionText":"A database container crashes repeatedly. The administrator wants to see the last 10 lines of the container's logs before it exited. Which command should be used?","explanation":"The `podman logs --tail 10 ` command retrieves the last 10 lines of the container's log output, which is exactly what the administrator needs to see the final log entries before the container exited. The `--tail` flag specifies the number of lines from the end of the log, making it ideal for troubleshooting a crash without viewing the entire log history.","domainId":"48e85963-d007-4106-bbcf-2413f7c7de86","difficulty":"hard","questionType":"multiple_choice","pbqConfig":null,"exhibitText":null,"options":[{"id":"873fae2d-8c68-4aa3-a8f4-d0ef44581ca2","label":null,"text":"podman logs --tail 10 ","isCorrect":true},{"id":"96e17c3b-980d-4650-9f92-ed1275c954f4","label":null,"text":"podman logs -f ","isCorrect":false},{"id":"74d40d54-30eb-41a8-a285-38a2deefff77","label":null,"text":"podman logs --since 10m ","isCorrect":false},{"id":"01d94887-c0ab-440d-be46-de00e37c7ee2","label":null,"text":"podman inspect ","isCorrect":false}],"domainName":"Manage containers","domainSlug":"manage-containers"},{"id":"508daa0e-48a7-411b-b17c-328da818ac4b","slug":"an-administrator-receives-an-alert-that-a-process-named-apa-fib4b","questionText":"An administrator receives an alert that a process named 'apache2' is consuming excessive CPU. The administrator needs to identify the PID of the process and then change its priority to the lowest possible value (least favorable scheduling). Which sequence of commands should be used?","explanation":"`pidof apache2` retrieves the PID of the apache2 process, and `renice -n 19 -p ` sets the priority to the lowest possible (least favorable) scheduling value. In Linux, `renice` accepts nice values from -20 (highest priority) to 19 (lowest priority), so 19 is the correct value for the least favorable scheduling.","domainId":"bf164586-a9cd-44fe-b59c-610371171f4a","difficulty":"medium","questionType":"multiple_choice","pbqConfig":null,"exhibitText":null,"options":[{"id":"f487df21-27f8-4bbc-8e52-51a56059c11a","label":null,"text":"pidof apache2; renice -n 20 -p ","isCorrect":false},{"id":"0fa8e434-df25-4913-a4b6-4a5ac077b8e3","label":null,"text":"pidof apache2; renice -n 19 -p ","isCorrect":true},{"id":"8e623659-f9c0-48fb-82f5-6100d89e9715","label":null,"text":"ps -C apache2 -o pid=; renice -n -20 -p ","isCorrect":false},{"id":"c089107f-804a-4846-896f-5c886ff949b3","label":null,"text":"ps aux | grep apache2; nice -n 19 ","isCorrect":false}],"domainName":"Essential Tools","domainSlug":"essential-tools"},{"id":"d55b1298-5075-4aaf-9246-f7d002e29f5e","slug":"a-developer-wrote-a-shell-script-that-is-intended-to-back-up-dbvsx","questionText":"A developer wrote a shell script that is intended to back up log files by copying all .log files from /var/log/myapp to /backup/logs. The script runs daily via cron but the backup folder is empty. The script contains the following line: `cp /var/log/myapp/*.log /backup/logs/`. What is the most likely reason the backup fails?","explanation":"The glob pattern `*.log` in the `cp` command is expanded by the shell at the time the script runs. If no `.log` files exist in `/var/log/myapp` when the cron job executes, the shell passes the literal string `*.log` to `cp`, which then fails with a 'No such file or directory' error (or, depending on shell settings, may silently do nothing). This is a common issue when log rotation or cleanup removes files before the backup runs.","domainId":"ed12ce0d-f98d-4e00-a093-9a4d325d0e0d","difficulty":"easy","questionType":"multiple_choice","pbqConfig":null,"exhibitText":null,"options":[{"id":"09b88c2c-69ed-4a11-9d2a-23aeea2f3c9f","label":null,"text":"The PATH variable in cron is not set, so cp cannot be found.","isCorrect":false},{"id":"05052010-861d-44e4-b47d-3379f114bdbd","label":nu