cat <file>
Print text file contents.
Package metadata, package logs, process snapshots, and signal language.
List simulated installed Linux packages.
Advanced 02 Package/process ops APT package detailsInspect simulated package policy and metadata.
Advanced 03 Package/process ops DPKG package listUse dpkg to review installed package records.
Advanced 04 Package/process ops DPKG filesList simulated files owned by a package.
Advanced 05 Package/process ops DPKG status reviewConnect package status to logs.
Advanced Checkpoint 06 Package/process ops Brew listPractice macOS-style package inspection.
Advanced 07 Package/process ops Brew info reviewCompare brew info with Linux package logs.
Advanced 08 Package/process ops Pgrep process lookupFind simulated process IDs by name.
Advanced 09 Package/process ops Top reviewUse top and ps for process snapshots.
Advanced 10 Package/process ops Package and process checkpointReview packages, process state, and recent package logs.
Capstone Checkpoint 11 Package/process ops APT DPKG Brew compareCompare Linux and macOS package inspection tools.
Admin 12 Package/process ops Package file ownershipMap package names to owned files.
Admin 13 Package/process ops Package status log correlationConnect package status output to package logs.
Admin Checkpoint 14 Package/process ops Process lookup drillFind process IDs and compare snapshots.
Admin 15 Package/process ops Signal choice reviewRecord signal intent without stopping anything.
Admin 16 Package/process ops Top ps snapshotCompare top and ps output before acting.
Admin 17 Package/process ops Package change evidenceFind package changes and capture an evidence note.
Advanced 18 Package/process ops Package process expanded checkpointTie package inventory, process state, and logs together.
Capstone Checkpoint 19 Package/process ops Package origin reviewCompare installed package metadata with package-owned files and change logs.
Admin 20 Package/process ops Process signal evidenceIdentify a process, inspect the snapshot, and record a simulated signal.
AdminCreate a free account to sync completed lessons, XP, streaks, course status, and your next lesson across sessions.
Checking account status...
Progress sync is idle.
Progress sync stores completion IDs, scores, streaks, badges, and game settings. Terminal contents, editor snippets, lab scratch, email, and real names are never published on leaderboards or share cards.
cat <file>
Print text file contents.
grep [-i] <text> <file>
Find literal text inside a file.
tee <file>
Write piped text to a lab file and keep it on screen.
ps
Show training server processes.
top|pgrep|kill
Inspect simulated process health and signals.
journalctl -u <service>
Read simulated service journal entries.
apt|dpkg|brew
Inspect simulated Linux and macOS package metadata.