Mission 360

Capstone verified restore

Stage, compare, archive, and hash a restored web artifact.

Capstone labs

8 minutes Capstone Lesson 360 of 360

cpfiledifftarsha256sum

Lesson 360 of 360 0/360 lessons 0/17 missions Capstone labs · 8 minutes

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learner@clairos:/home/learner $ Unix ops lab: type a command, press Enter

Instructions 8 minutes

Click any instruction for the command details, the why, and the common mistake to avoid.

Stage the restored file

Run cp restore/index.html lab/verified-restore.html.

cp restore/index.html lab/verified-restore.html

Identify the staged artifact

Run file lab/verified-restore.html.

file lab/verified-restore.html

Compare source and staged copy

Run diff restore/index.html lab/verified-restore.html.

diff restore/index.html lab/verified-restore.html

Archive the staged restore

Run tar -cf lab/verified-restore.tar lab/verified-restore.html.

tar -cf lab/verified-restore.tar lab/verified-restore.html

Hash the restore archive

Run sha256sum lab/verified-restore.tar.

sha256sum lab/verified-restore.tar

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Lesson support

What to notice while you play.

Objective

Build repeatable confidence with proving a restore artifact before deployment.

Hint

Start with cp restore/index.html lab/verified-restore.html, inspect the result, then continue in order.

Why it matters

Proving a restore artifact before deployment helps operators explain what they know before they change anything.

Common mistakes

Skipping the output that proves proving a restore artifact before deployment.
Changing several things before recording a baseline.

Reference

Commands in this lesson.

diff <left> <right>

Compare two lab text files.

sha256sum <file>

Print a deterministic training checksum.

file <path>

Identify a simulated file, directory, link, or text format.

tar -cf|-tf <archive>

Create and list training archives.

cp <src> <dst>

Copy a file.