Capstone labs · Lesson 7 of 18 · 8 minutes

Capstone package audit

Review package state and process state together.

Open the lab Course map

Mastery 0/3Run itExplain itApply it

learner@clairos:~ $

↑ history · Tab complete · Ctrl+C cancel · Esc, Tab to leaveExit 0

Your objectives

Hints are always available. Wrong turns never cost XP.

1
List apt packages
Run apt list --installed.
Hint & worked example
Inspect a fixed training package inventory. The simulator cannot install or upgrade your computer.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
apt list --installed
```
Remember: Candidate, installed, and repository versions answer different questions.
2
List dpkg packages
Run dpkg -l.
Hint & worked example
Inspect installed-package records in the synthetic Debian-style environment.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
dpkg -l
```
Remember: Repository availability and installed package state are separate evidence.
3
Show process snapshot
Run top.
Hint & worked example
Inspect a single training snapshot of process and resource activity.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
top
```
Remember: This lab does not run a continuously refreshing process monitor.

Understand the pattern

Junior operators build confidence by gathering evidence before changing systems.

apt: Inspect a fixed training package inventory. The simulator cannot install or upgrade your computer.
Candidate, installed, and repository versions answer different questions.
dpkg: Inspect installed-package records in the synthetic Debian-style environment.
Repository availability and installed package state are separate evidence.
top: Inspect a single training snapshot of process and resource activity.
This lab does not run a continuously refreshing process monitor.

Worked example and expected result

$ apt list --installed

fake-nginx/learn 1.0 installed
fake-openssh/learn 9.9 installed
coreutils/learn 9.5 installed

Exit status: 0. The command completed successfully in the training fixture.

$ dpkg -l

ii  fake-nginx     1.0  training web server
ii  fake-openssh   9.9  training ssh server
ii  coreutils      9.5  training utilities

Exit status: 0. The command completed successfully in the training fixture.

$ top

top - 10:26:04 up 12 days, 1 learner, load average: 0.04, 0.03, 0.01
PID USER      %CPU %MEM COMMAND
42  www-data   0.2  1.1 nginx
77  root       0.1  0.8 sshd
126 root       0.0  0.3 cron

Exit status: 0. The command completed successfully in the training fixture.

Try a variation

Repeat this workflow in the sandbox with a different scratch filename. Keep the system fixtures unchanged and compare the observed output with your expectation before moving on.

Explain it

In “Capstone package audit”, which interpretation is safe?Repository availability and installed package state are separate evidence.A command appearing in history proves it completed successfully.A successful first check guarantees that every dependent service is healthy.

Apply it elsewhere

Before adapting the dpkg workflow from “Capstone package audit” to another server, what should you do?Paste the training paths unchanged into production.Skip output inspection whenever the command is familiar.Confirm the current directory, target identity, permissions, and the installed command behavior first.

Keep the momentum.

Complete the lab, then explain and apply the pattern.

Next: Capstone incident runbook Try an incident drill

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Keep learning

GNU Coreutils manual · GNU Bash manual