Certification862 problems· 22 reviewed

RHCSA

862 incident response problems that help with RHCSA prep.

All problems (862)

LINUX-148The shell history is redirected to a network share, and login latency spikes only when the filer fails over mid-sessionAuthentication is fine, but the interactive environment blocks on a remote dependency nobody modeled as critical.LinuxIntermediate15 minPro LINUX-110tmpfiles.d recreates the runtime directory as root after package upgrade and the app cannot create its socket anymoreThe service runs until reboot or package install, then startup fails because the managed runtime path comes back with different ownership.LinuxIntermediate15 minPro LINUX-1250A bind mount becomes active later in boot but the application still reads stale local contents written before the mount arrivedSystemd reports the mount healthy, yet some files remain wrong because a process touched the target path before the bind mount overlaid it.LinuxIntermediate16 minPro LINUX-1255A bind mount is healthy after boot but the application still reads stale local contentAn application writes defaults during boot and later the correct bind mount arrives, hiding what really happened earlier.LinuxIntermediate16 minPro LINUX-351A firewalld rich rule is correct while the packet actually arrives through a zone bound by a newly generated virtual interface profile during a staged decommissionThe rule exists, but not in the policy domain the traffic now uses. The service still works through the primary path, but one dependency only fails when the old component is finally drained away.LinuxIntermediate16 minPro LINUX-136A firewalld zone is assigned through NetworkManager, but the new uplink profile inherits the default zone after interface replacementThe rule set exists, yet the replacement interface no longer lives in the same policy domain.LinuxIntermediate16 minPro LINUX-375A log rotation policy is correct while a filebeat or rsyslog harvester keeps the deleted descriptor open and disk usage never falls during a staged decommissionThe rotated files are gone from the directory and still present on disk. The service still works through the primary path, but one dependency only fails when the old component is finally drained away.LinuxIntermediate16 minPro LINUX-1245A mount unit starts successfully but applications still failA service writes configuration or data during early boot and later the correct bind mount hides those writes, causing confusing divergence.LinuxIntermediate16 minPro LINUX-1231A service starts on reboot but reads the wrong configA service works under a maintenance script and after reboot starts with missing variables or wrong endpoints.LinuxIntermediate16 minPro LINUX-1241A systemd override exists but the service ignores itA service is hardened or reconfigured with an override and restarts successfully, but later behavior proves the new settings were never applied to the active instance.LinuxIntermediate16 minPro LINUX-1246A systemd override exists but the service ignores itAn operator hardens a service with an override and later discovers the live instance still runs with the old settings.LinuxIntermediate16 minPro LINUX-1251A systemd unit override exists but the running service ignores itA service is reconfigured with an override and later behavior proves the live instance never consumed the new file.LinuxIntermediate16 minPro LINUX-168A telemetry agent writes checkpoints to the small root disk instead of the intended data mount during a failover rehearsalLogs keep flowing while state files quietly consume the partition the system needs most. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.LinuxIntermediate16 minPro LINUX-107A tuned profile reapplies IRQ balancing after reboot and network latency returns on the database nodeManual tuning helped temporarily, but the performance regression comes back because the system profile manager writes its own preferred state at boot.LinuxIntermediate16 minPro LINUX-1183Cron job works in shell but fails at nightA community script looks healthy in manual tests. Overnight runs fail because cron does not provide the PATH and locale the script assumes.LinuxIntermediate16 minPro LINUX-1215Deploy succeeds but the service still uses the old binaryA deployment replaces the binary on disk, but runtime still behaves like the old version.LinuxIntermediate16 minPro LINUX-115GRUB saved_entry points at the wrong kernel after package install changes the menu orderThe default kernel appears pinned, but the bootloader restores a different entry because the persistent selector tracks index semantics the team forgot about.LinuxIntermediate16 minPro LINUX-204Interactive login depends on a remote home directory path that becomes the real bottleneck during a storage hesitation during a failover rehearsalAuthentication is valid while the shell environment blocks on network storage. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.LinuxIntermediate16 minPro LINUX-1216Oneshot systemd job succeeds manually but fails at bootA maintenance job works from an operator shell but fails every reboot when started as a oneshot unit.LinuxIntermediate16 minPro LINUX-128PAM faillock works on local users, but NFS-backed home directory latency makes remote users appear to authenticate and then fail session setupPassword checks succeed, yet login still breaks because account and session modules depend on slow remote state.LinuxIntermediate16 minPro