RHCSA
862 incident response problems that help with RHCSA prep.
먼저 읽을 가이드
추천 문제
All problems (862)
LINUX-1313A sudo-based maintenance timer works on one host and fails on anotherA sudo-based maintenance timer works on one host and fails on another focuses on Identity And Access and asks the reader to isolate the key signal in Linux. Policy fragments are code; ordering changes behavior even when the file set looks identical.LinuxIntermediate13 minProLINUX-1305A systemd oneshot generates an environment file after the main service already startedA host generates runtime config through a helper unit and the main service intermittently starts with blank values after reboot.LinuxIntermediate13 minProLINUX-1321A systemd PathUnit stops triggering after a release process moves from in-place writes to symlink swaps for current release selectionThe watched path appears to change, yet the unit never fires because the update method changed from file modification to symlink target replacement.LinuxIntermediate13 minProLINUX-1343An rsync backup completes and restore misses ACLsAn rsync backup completes and restore misses ACLs focuses on incident-response and asks the reader to isolate the key signal in Linux. Backup correctness includes metadata preservation, not only file bytes and timestamps.LinuxIntermediate13 minProLINUX-1322An rsyslog pipeline drops the noisiest incident linesAn incident generates a log burst and operators later discover the central pipeline never received the noisiest part of the timeline.LinuxIntermediate13 minProLINUX-1287A backup job writes successfully but its retention never trims old archivesA backup job writes successfully but its retention never trims old archives focuses on deployment-artifacts and asks the reader to isolate the key signal. Retention bugs often come from time interpretation drift, not from missing delete...LinuxIntermediate14 minProLINUX-1263A cron job works under the user shell but fails overnightLinux incident scenario used for structured troubleshooting practice.LinuxIntermediate14 minProLINUX-1268A cron job works under the user shell but fails overnightA housekeeping script behaves perfectly by hand and later cannot find commands, config files, or credentials when run by cron.LinuxIntermediate14 minProLINUX-1297A cron-based backup script keeps skipping one directoryA backup job is green but one mounted data path never appears in the resulting archive.LinuxIntermediate14 minProLINUX-1301A Docker service starts cleanly after boot and still loses all application dataA host reboots after maintenance and later the app appears healthy while missing the persistent data it should have mounted.LinuxIntermediate14 minProLINUX-1281A log cleanup script deletes the current file instead of yesterday'sA housekeeping job that worked for months starts rotating or deleting the wrong log file after a seemingly unrelated host standardization.LinuxIntermediate14 minProLINUX-153A profile script exports a locale unavailable on one batch host, and only the nightly report job starts misparsing decimal inputEverything interactive seems normal, but one noninteractive environment inherits a broken locale assumption.LinuxIntermediate14 minProLINUX-1276A service starts under systemd but still reads the wrong configurationA service launches successfully but points at the wrong path or endpoint only when started by systemd.LinuxIntermediate14 minProLINUX-1258A sudo policy file exists in sudoers.d but is ignoredAn automation role adds a new sudo include file and the target account still cannot use the expected command set.LinuxIntermediate14 minProLINUX-1291A systemd service starts normally by hand but fails at bootA service works after the system is fully up and repeatedly fails only during boot or reboot flows.LinuxIntermediate14 minProLINUX-1295A websocket reverse proxy works until reloadA proxy reload appears harmless and long-lived websocket sessions begin failing only on one path afterward.LinuxIntermediate14 minProLINUX-1319An NFS mount is reachable and application writes still hangAn NFS mount is reachable and application writes still hang focuses on service-health-gates and asks the reader to isolate the key signal in Linux. Mount option changes can alter outage behavior without changing normal-path performance at all.LinuxIntermediate14 minProLINUX-1315An rsync deploy appears complete and a stale binary keeps runningA classic release-symlink deploy pattern works until one service keeps using stale assets even after a restart.LinuxIntermediate14 minProLINUX-1225Cron mail never arrivesA scheduled maintenance job says it ran successfully, but operators never receive the expected email or log output when it degrades.LinuxIntermediate14 minProLINUX-139The login shell sources an unexpected umask from an earlier profile.d file and new release artifacts inherit overly broad permissionsFile mode drift appears random until the team notices which profile file wins lexically for interactive release sessions.LinuxIntermediate14 minPro