Files and paths · Lesson 28 of 36 · 8 minutes

Temp cleanup review

Inspect temporary paths before cleanup decisions.

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 temp
Run ls -la /tmp.
Hint & worked example
List directory entries; -a includes hidden names and -l adds ownership and permission detail.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
ls -la /tmp
```
Remember: A listing is not proof that you can read or modify every listed file.
2
Inspect temp
Run stat /tmp.
Hint & worked example
Inspect a file or directory metadata record, including ownership, permissions, and size.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
stat /tmp
```
Remember: Metadata and file contents answer different questions.
3
Verify temp directory
Run test -d /tmp.
Hint & worked example
Evaluate a file or string condition through its exit status rather than printed output.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
test -d /tmp
```
Remember: A successful test usually prints nothing; inspect $? or chain a command.

Understand the pattern

Junior operators build confidence by gathering evidence before changing systems.

ls: List directory entries; -a includes hidden names and -l adds ownership and permission detail.
A listing is not proof that you can read or modify every listed file.
stat: Inspect a file or directory metadata record, including ownership, permissions, and size.
Metadata and file contents answer different questions.
test: Evaluate a file or string condition through its exit status rather than printed output.
A successful test usually prints nothing; inspect $? or chain a command.

Worked example and expected result

$ ls -la /tmp

(no output; exit 0)

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

$ stat /tmp

Path: /tmp
Type: dir
Mode: drwxrwxrwx
Owner: root
Group: root
Size: 0 items

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

$ test -d /tmp

(no output; exit 0)

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 “Temp cleanup review”, which interpretation is safe?A command appearing in history proves it completed successfully.A successful first check guarantees that every dependent service is healthy.Metadata and file contents answer different questions.

Apply it elsewhere

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

Keep the momentum.

Complete the lab, then explain and apply the pattern.

Next: File type inspection Try an incident drill

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