Package/process ops · Lesson 16 of 20 · 8 minutes

Top ps snapshot

Compare top and ps output before acting.

Open the lab Course map

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learner@clairos:~ $

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Your objectives

Hints are always available. Wrong turns never cost XP.

1
Read top 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.
2
Read ps snapshot
Run ps.
Hint & worked example
Inspect a bounded snapshot of simulated processes.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
ps
```
Remember: A process being present does not prove that its service can handle requests.
3
Read load average
Run uptime.
Hint & worked example
Read simulated runtime and load information.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
uptime
```
Remember: Load average is not a direct CPU percentage.

Understand the pattern

Junior operators build confidence by gathering evidence before changing systems.

top: Inspect a single training snapshot of process and resource activity.
This lab does not run a continuously refreshing process monitor.
ps: Inspect a bounded snapshot of simulated processes.
A process being present does not prove that its service can handle requests.
uptime: Read simulated runtime and load information.
Load average is not a direct CPU percentage.

Worked example and expected result

$ 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.

$ ps

PID  USER      COMMAND
1    root      systemd --simulated
42   www-data  nginx: static process
77   root      sshd: listener
108  learner   clairos-learn-terminal
126  root      cron

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

$ uptime

 10:26:04 up 12 days,  4:18,  1 learner,  load average: 0.04, 0.03, 0.01

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 “Top ps snapshot”, which interpretation is safe?A process being present does not prove that its service can handle requests.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 ps workflow from “Top ps snapshot” 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: Package change evidence Try an incident drill

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