RHCSA
862 incident response problems that help with RHCSA prep.
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All problems (862)
LINUX-1491A systemd service restarts fine by hand and fails on bootA service fails only at boot after storage layout changes, yet starts immediately once the system is up.LinuxIntermediate10 minProLINUX-1501A systemd service starts by hand and fails on bootA service fails only at boot after storage layout changes but starts fine later.LinuxIntermediate10 minProLINUX-1521A systemd service works interactively and fails at bootA service fails only at boot after storage layout changes but starts later without issue.LinuxIntermediate10 minProLINUX-1531A systemd service works manually and fails at bootA service fails only at boot after storage layout changes but starts later without issue.LinuxIntermediate10 minProLINUX-1511A systemd timer runs manually and misses boot-time executionA timer never runs after reboot despite manual starts working immediately.LinuxIntermediate10 minProLINUX-1387A tmpfiles cleanup removes the app cache every bootA tmpfiles cleanup removes the app cache every boot focuses on cluster-maintenance and asks the reader to isolate the key signal in Linux. Path semantic changes can quietly bring an app under cleanup rules it was never designed to tolerate.LinuxIntermediate10 minProLINUX-1441A tmpfiles rule recreates a runtime directory on new hosts and leaves old hosts brokenA service begins failing only on long-lived hosts after a package update refreshed tmpfiles ownership.LinuxIntermediate10 minProLINUX-1458An rsync restore looks successful and the filesystem still fillsA DR restore fills the destination volume unexpectedly even though source usage looked safe.LinuxIntermediate10 minProLINUX-1419An rsyslog failover action stamps overflow files with the wrong hostnameAn rsyslog failover action stamps overflow files with the wrong hostname focuses on Observability Pipeline and asks the reader to isolate the key signal in redhat. Fallback logging branches often preserve assumptions from older init s...LinuxIntermediate10 minProLINUX-1399An rsyslog failover path works and one destination receives events with wrong...An rsyslog failover path works and one destination receives events with... focuses on incident-response and asks the reader to isolate the key signal in Linux. Split logging branches can diverge in subtle data-shaping ways even when transport su...LinuxIntermediate10 minProLINUX-1449An rsyslog fallback path misroutes in productionFallback log routing breaks only after cloud automation starts renaming nodes post-boot.LinuxIntermediate10 minProLINUX-1439An rsyslog overflow file shows a stale hostnameAn rsyslog overflow file shows a stale hostname focuses on Observability Pipeline and asks the reader to isolate the key signal in redhat. Fallback logging branches often preserve legacy environment assumptions after the main path...LinuxIntermediate10 minProLINUX-1429An rsyslog overflow file shows the wrong hostnameAn rsyslog overflow file shows the wrong hostname focuses on Observability Pipeline and asks the reader to isolate the key signal in redhat. Fallback logging branches often preserve old environment assumptions long after the primary...LinuxIntermediate10 minProLINUX-1423An unattended package timer fails and manual apt update worksAn unattended package timer fails and manual apt update works focuses on package-management and asks the reader to isolate the key signal in ubuntu. Package timers often run with much less environment context than an admin shell, especially...LinuxIntermediate10 minProLINUX-1409rsyslog writes normal logs in UTC and fallback overflow logs in local timersyslog writes normal logs in UTC and fallback overflow logs in local time focuses on Observability Pipeline and asks the reader to isolate the key signal in redhat. Time skew symptoms in logs can be formatting-path bugs rather than actu...LinuxIntermediate10 minProLINUX-1397A bridge interface works and one VLAN loses DHCPA host bridge cleanup modernizes VLAN handling and later one attached appliance stops receiving DHCP only after reboot.LinuxIntermediate11 minProLINUX-1457A cloud-init refresh keeps rewriting netplan matchesBoot networking changes unexpectedly only on hosts that fell back to a different datasource after firmware refresh.LinuxIntermediate11 minProLINUX-1326A cron script succeeds manually and fails at nightA maintenance script is verified interactively and later fails only when triggered on schedule during the night.LinuxIntermediate11 minProLINUX-1367A cron task succeeds by hand and fails at nightA maintenance script is validated interactively and later fails only in scheduled overnight execution.LinuxIntermediate11 minProLINUX-1383A dnf module stream migration succeeds on most hosts and one host keeps the old runtimeA fleet standardizes on a new runtime stream and one machine alone keeps reverting to the previous module set.LinuxIntermediate11 minPro