RHCSA
862 incident response problems that help with RHCSA prep.
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All problems (862)
LINUX-1256A command works manually but fails from a systemd timerA maintenance script works perfectly from the command line and mysteriously fails only on its scheduled timer run.LinuxIntermediate15 minProLINUX-150A custom udev rule matches the old NIC naming scheme and no longer applies the MTU override after motherboard replacementNetwork behavior changed with hardware, but the automation still keys off the previous identity model.LinuxIntermediate15 minProLINUX-116A firewalld rich rule was added at runtime only and the maintenance reboot silently removes the allow pathThe fix works immediately, but the next restart recreates the outage because only the live firewall configuration was updated.LinuxIntermediate15 minProLINUX-142A log shipping agent rotates its own state file to the root partition and eventually fills the boot disk instead of the intended data mountObservability remains intact, but the persistence path for agent state quietly lives on a much smaller filesystem.LinuxIntermediate15 minProLINUX-156A package postinstall recreates a cache directory with the right owner but the wrong SELinux context, and the app fails only after the next restartThe path exists and ownership looks correct, but the mandatory access model still disagrees.LinuxIntermediate15 minProLINUX-1283A service restart works by hand but not via timerA service behaves perfectly on boot and manual restart, then fails only on scheduled restarts from a systemd timer.LinuxIntermediate15 minProLINUX-1226A sudoers include file looks valid but is ignoredAn automation run updates a sudoers include and operators later find the rule is present on disk but not effective.LinuxIntermediate15 minProLINUX-158A systemd path unit watches for a file create, but the app replaces the file atomically and only modify events ever happenAutomation should fire, yet the real application update pattern doesn't match the chosen watcher trigger.LinuxIntermediate15 minProLINUX-1299A systemd-notify service starts flappingA service upgraded to systemd-notify appears healthier in status output while dependent clients begin racing and failing.LinuxIntermediate15 minProLINUX-132A tmpfs runs out of inodes long before bytes, and the application reports no-space-left while monitoring still shows free memoryCapacity alarms focus on memory size, but the real exhaustion point is object count.LinuxIntermediate15 minProLINUX-130Checksum offload was disabled only at runtime, and after reboot the same packet corruption symptom returns with no config drift visibleThe fix appears mysterious because the network setting changed outside the persistent configuration model.LinuxIntermediate15 minProLINUX-134Coredumps are enabled, but the external coredump partition is full so every crash report silently disappearsDevelopers expect postmortem artifacts, yet the configured storage target has no remaining capacity.LinuxIntermediate15 minProLINUX-1230Disk usage looks normal in du but the filesystem is still fullOperators clear logs and still cannot reclaim space because a log shipping or journaling process keeps writing to deleted files.LinuxIntermediate15 minProLINUX-106logrotate recreates the file but resets the ACL and the application loses write access after midnightThe service is healthy all day, yet every night it fails because the replacement log file does not preserve the same access model as the original.LinuxIntermediate15 minProLINUX-1278Logrotate runs successfully but the daemon stops writingA service rename or packaging update leaves rotation seemingly healthy while the process continues writing to deleted or old files.LinuxIntermediate15 minProLINUX-1214NOPASSWD exists in sudoers but a later include quietly overrides itAn admin entry is present, yet the operator is still prompted because include order means a later rule wins.LinuxIntermediate15 minProLINUX-1220Rsync deploy keeps old assetsA static asset deploy appears successful but stale files remain because the synchronized directory layer was not the one the team intended.LinuxIntermediate15 minProLINUX-1261Rsync finishes without errors but stale files remainLinux incident scenario used for structured troubleshooting practice.LinuxIntermediate15 minProLINUX-1266Rsync finishes without errors but stale files remainA deploy sync completes and old assets remain live because rsync never compared the paths the operator thought it was comparing.LinuxIntermediate15 minProLINUX-1224Rsync reports success but old assets remainA deploy copies files into a path that appears right, but delete and prune logic act on another mounted layer.LinuxIntermediate15 minPro