Run apt list --installed.
apt list --installed
Review packages, process state, and recent package logs.
Package/process opsaptdpkgtopgrep
Click any instruction for the command details, the why, and the common mistake to avoid.
Run apt list --installed.
apt list --installed
Run dpkg -l.
dpkg -l
Run top.
top
Run grep upgrade /var/log/dpkg.log.
grep upgrade /var/log/dpkg.log
Create 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.
Review packages, process state, and recent package logs.
Run the commands in order and compare the outputs.
Junior operators build confidence by gathering evidence before changing systems.
grep [-i] <text> <file>
Find literal text inside a file.
top|pgrep|kill
Inspect simulated process health and signals.
apt|dpkg|brew
Inspect simulated Linux and macOS package metadata.