RHCSA
862 incident response problems that help with RHCSA prep.
먼저 읽을 가이드
추천 문제
All problems (862)
LINUX-1468A custom SELinux module loads and does nothingA local SELinux workaround stops working after a policy package update.LinuxAdvanced11 minProLINUX-1560A fail2ban jail updates and one service still blocks valid clientsValid clients are blocked only after reboot on one service host.LinuxAdvanced11 minProLINUX-1482A Fedora rsyslog queue drains and journald still growsDisk use keeps growing under journald after rsyslog spool hardening on Fedora-based log collectors.LinuxAdvanced11 minProLINUX-1514A netplan migration looks correct and routes still vanish on rebootRoutes disappear after reboot on instances migrated from one renderer to another.LinuxAdvanced11 minProLINUX-1524A netplan migration looks correct and routes still vanish on rebootRoutes disappear after reboot on instances migrated to a new renderer.LinuxAdvanced11 minProLINUX-1494A NetworkManager migration finishes and one host still loses routesRoutes disappear only after reboot on systems migrated from netplan renderer A to renderer B.LinuxAdvanced11 minProLINUX-1504A NetworkManager migration finishes and one host still loses routesRoutes disappear only after reboot on systems migrated to a new renderer.LinuxAdvanced11 minProLINUX-1566A Podman quadlet unit updates and one host still runs the old imageOne host keeps starting the old image after a quadlet update.LinuxAdvanced11 minProLINUX-1554A rootless Podman migration succeeds and one service still loses socketsA rootless service loses its socket only after log rotation on one host.LinuxAdvanced11 minProLINUX-1477A SELinux relabel completes and one service still failsA service remains blocked by SELinux after an apparently successful relabel on a containerized host path.LinuxAdvanced11 minProLINUX-1486A sudoers policy looks correct and one host still denies adminsAdmin sudo fails only after package upgrades on hosts bootstrapped with cloud-init snippets.LinuxAdvanced11 minProLINUX-1556An LVM extension completes and one service still fills the old pathOnly one service fills an old mount after an LVM grow and path migration.LinuxAdvanced11 minProLINUX-1376A disk-pressure alert points at journald and the actual growth comes from rootless container JSON logs under one user's runtime directory that the cleanup job never scansThe host is filling up, yet the expected journal usage remains normal because the unbounded logs are outside the cleanup path.LinuxIntermediate12 minProLINUX-1518A firewalld zone change applies and old flows still passTraffic that should be blocked still passes immediately after a zone refactor.LinuxAdvanced12 minProLINUX-1528A firewalld zone change applies and old flows still passTraffic that should be blocked still passes immediately after a zone refactor.LinuxAdvanced12 minProLINUX-1465A logrotate copytruncate leaves an audit gapAudit logs show a regular gap immediately after rotation on one node class.LinuxAdvanced12 minProLINUX-1500A PAM MFA rollout validates tokens and one bastion still bypasses promptsA single bastion host skips MFA after a fleet-wide PAM rollout even though the shared config package is current.LinuxAdvanced12 minProLINUX-1351A systemd timer writes backups fine by hand and fails overnightA systemd timer writes backups fine by hand and fails overnight focuses on execution-context and asks the reader to isolate the key signal in AWS. Scheduled jobs often fail because they inherit less context, not because the command itself is wrong.LinuxIntermediate12 minProLINUX-1349A timer-driven snapshot job works manually and misses AWS credentials at nightA timer-driven snapshot job works manually and misses AWS credentials at night focuses on execution-context and asks the reader to isolate the key signal in AWS. Successful manual CLI tests do not prove systemd timers inherit the same c...LinuxIntermediate12 minProLINUX-1470An mdadm array assembles degradedA RAID set boots degraded only after a lab-tested spare is returned to the chassis.LinuxAdvanced12 minPro