Linux
390 incident problems in Linux environments.
먼저 읽을 가이드
추천 문제
All problems (390)
LINUX-1361A systemd path unit stopped triggering after a deployment model switched from in-place writes to symlink swaps for the current release pointerThe watched path still changes logically, yet no event fires because the release tool now updates a symlink target instead of modifying the file directly.LinuxIntermediate12 minProLINUX-1371A systemd PathUnit never triggers after a blue-green releaseA deployment hook relies on a PathUnit to reload a service and later one release lands without any of the expected follow-up actions.LinuxIntermediate12 minProLINUX-1341A systemd service works by hand and fails on bootA systemd service works by hand and fails on boot focuses on cluster-maintenance and asks the reader to isolate the key signal in Linux. Systemd may need files to exist before the process ever starts, not only by the time the command runs.LinuxIntermediate12 minProLINUX-1363An Ubuntu apt migration adds signed-by cleanly and one host still failsA repository trust migration is rolled out and later one host class keeps failing apt update despite the new signed-by config being present.LinuxIntermediate12 minProLINUX-1345An Ubuntu cloud image keeps restoring the wrong routeA network incident is repaired interactively and the host reverts to the old broken route after reboot or reprovision events.LinuxIntermediate12 minProLINUX-1325sudo stops honoring one permissionA host hardening change adds a new sudoers.d file and later one operational command begins prompting or denying unexpectedly.LinuxIntermediate12 minProLINUX-1337A backup mount works (mount-started-before-network-backed-cryptsetup-unlock)A backup mount works (the key signal) focuses on service-health-gates and asks the reader to isolate the key signal in Linux. Boot-time storage readiness depends on the unlock path, not just on the f...LinuxIntermediate13 minProLINUX-1353A logrotate policy runs successfully and a long-running uploader loses chunksA logrotate policy runs successfully and a long-running uploader loses chunks focuses on incident-response and asks the reader to isolate the key signal in Linux. A clean logrotate run does not prove the application tolerated the rotation semantics.LinuxIntermediate13 minProLINUX-1331A netplan change looks valid and the host still boots without networkA refreshed Ubuntu image is rolled out and only new instances lose network while the same config works on existing hosts.LinuxIntermediate13 minProLINUX-1308A sudo command works interactively and fails in a systemd serviceA maintenance script works for an operator shell and later fails only when run from a service timer or oneshot unit.LinuxIntermediate13 minProLINUX-1347A sudo MFA rule works for direct users and fails for SSH jump usersA sudo MFA rule works for direct users and fails for SSH jump users focuses on Identity And Access and asks the reader to isolate the key signal in Linux. Authentication bugs after updates often come from include-order drift, not missing modu...LinuxIntermediate13 minProLINUX-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-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-1630A locale archive is updated and one service still renders old textOne service still renders old locale output after an update.LinuxIntermediate10 minProLINUX-1620A package upgrade succeeds and one daemon still loads the old libraryOne daemon still loads an old library after package upgrade.LinuxIntermediate10 minPro