Problems

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21 of 277 problems

Title	Topic	Acceptance	Difficulty	XP
Extract Error Lines from a LogPull every uppercase ERROR line out of a mixed log without catching its lowercase look-alike.easyLinux10 XP	Linux	New	easy	10
Growing a Logical VolumeThe XFS filesystem on /dev/vgdata/lvapp (mounted at /app) is full, and volume group vgdata has no free extents. A new empty disk /dev/vdc has been attached. WhimediumLinux5 XP	Linux	New	medium	5
Shrinking XFS vs ext4A colleague wants to give back 20 GiB from an over-sized logical volume so it can be used elsewhere. Which statement about shrinking the filesystem on it is cormediumLinux5 XP	Linux	New	medium	5
Keeping Logs Across RebootsA server rebooted unexpectedly. journalctl --list-boots shows only the current boot, so the logs from before the crash are gone. journald.conf has the default SmediumLinux5 XP	Linux	New	medium	5
Filtering the JournalYou need only errors or worse from the SSH service in the last hour. Which command gives that?easyLinux3 XP	Linux	New	easy	3
Password Aging with chageNew user maria must change her password at first login, and from then on every 90 days. Which commands do this?easyLinux3 XP	Linux	New	easy	3
Redirecting ErrorsWhich command writes both standard output and standard error of build.sh to build.log?easyLinux3 XP	Linux	New	easy	3
Absolute vs Relative PathsYou are in /var/log. Which path refers to the file /var/www/index.html?easyLinux3 XP	Linux	New	easy	3
Top Talkers in an Access LogBuild a pipeline that finds the busiest client IPs in a web server log and formats the report exactly.mediumShell20 XP	Shell	New	medium	20
Stop Tracking Build Output and LogsIgnore generated files with .gitignore and remove already-tracked ones from the index while keeping them on disk.easyGit10 XP	Git	New	easy	10
Find the Commit That Introduced a BugSearch a long history to find exactly which commit added a dangerous setting.hardGit40 XP	Git	New	hard	40
Recovering "Lost" CommitsYou ran git reset --hard HEAD~3 by mistake and the three commits disappeared from git log. How can you get them back?hardGit8 XP	Git	New	hard	8
Add an Init Container and a SidecarPrepare a shared volume before the app starts and ship its logs with a sidecar that reads the same volume.mediumKubernetes20 XP	Kubernetes	New	medium	20
Add a Log Sidecar to a Running AppAn app writes its log to a file nobody can read. Add a sidecar that streams the file to the container log, sharing a volume.mediumKubernetes20 XP	Kubernetes	New	medium	20
A Short-Lived Token for One AudienceAn app needs a token only to log in to Vault. Replace the auto-mounted all-purpose token with a projected one, bound to Vault's audience and valid for one hour.mediumKubernetes20 XP	Kubernetes	New	medium	20
Native Sidecar ContainersA Job's Pod needs a log-shipper that must be running before the main container starts and must not stop the Job from completing when the main container exits. HmediumKubernetes5 XP	Kubernetes	New	medium	5
When to Use a DaemonSetYou need exactly one log-collector Pod on every node, including nodes added later. Which controller fits best?easyKubernetes3 XP	Kubernetes	New	easy	3
Audit Policy Rule OrderYour audit policy has these rules in order: (1) level: RequestResponse for all resources, (2) level: Metadata for secrets. Secret values are showing up in the amediumKubernetes5 XP	Kubernetes	New	medium	5
Upgrades That Forget SettingsA release was installed with --set config.logLevel=debug. Later someone runs helm upgrade web internal/webapp --set replicaCount=3, and the log level silently gmediumKubernetes5 XP	Kubernetes	New	medium	5
Choosing a Storage ClassYou store compliance logs that must be kept for 7 years and are almost never read. Retrieval can take hours. Which object storage class is the most cost-effectimediumCloud5 XP	Cloud	New	medium	5
Importing Existing ResourcesAn S3 bucket acme-logs-prod was created by hand in the console. You want Terraform to manage it without recreating it, and you would like Terraform to draft themediumTerraform5 XP	Terraform	New	medium	5