Hosting Operations
Deletes or truncates filesCheck Required Files After Restore
You need to confirm every required path exists in the restored sandbox.
Command
cd restore-dr && rm -rf restore-sandbox/full && mkdir -p restore-sandbox/full && tar -xf backups/2026-06-25/site.tar -C restore-sandbox/full && find restore-sandbox/full -type f | sed 's#^restore-sandbox/full/##' | sort | comm -23 required-files.txt -Before you run this
System impact: Deletes, truncates, or overwrites data. Requires backup, preview, and exact path review before production use.
When not to use it: Do not rely on this alone for content integrity; pair it with checksums.
Expected output
No output means no required files are missing.
System impact
Deletes or truncates files. The existing restore-sandbox/full directory is removed and recreated, then file paths are compared.
When to use it
Use after sandbox extraction to prove required files are present.
When not to use it
Do not rely on this alone for content integrity; pair it with checksums.
Recovery / rollback
Remove the restore-dr/restore-sandbox/full directory from the fixture copy. Never point the rm -rf path at production data.
Watch this command run
Example output from a temporary Linux lab
This example uses disposable sample files and sanitized output so you can inspect the shape of the result before touching a real system.
$ cd restore-dr && cat required-files.txt
app/config.yml
app/orders.csv
app/secrets.env
bin/deploy.sh
public/index.html
uploads/avatar.txt$ cd restore-dr && rm -rf restore-sandbox/full && mkdir -p restore-sandbox/full && tar -xf backups/2026-06-25/site.tar -C restore-sandbox/full && find restore-sandbox/full -type f | sed 's#^restore-sandbox/full/##' | sort | comm -23 required-files.txt -
View reproducible demo details
These commands recreate the temporary example before running the command under review.
Reproduce this demo
cd restore-dr && cat required-files.txtcd restore-dr && rm -rf restore-sandbox/full && mkdir -p restore-sandbox/full && tar -xf backups/2026-06-25/site.tar -C restore-sandbox/full && find restore-sandbox/full -type f | sed 's#^restore-sandbox/full/##' | sort | comm -23 required-files.txt -
next steps
Related commands
Extract a Backup Into a Restore Sandbox
A restore drill should write to a sandbox, not production.
cd restore-dr && rm -rf restore-sandbox/full && mkdir -p restore-sandbox/full && tar -xf backups/2026-06-25/site.tar -C restore-sandbox/full
Verify Restored File Checksums
A restore is not validated until the bytes match.
cd restore-dr && rm -rf restore-sandbox/full && mkdir -p restore-sandbox/full && tar -xf backups/2026-06-25/site.tar -C restore-sandbox/full && (cd restore-sandbox/full && sha256sum -c CHECKSUMS.sha256)
Diff Restored Config Against Expected
A restored config can exist and still be the wrong config.
cd restore-dr && rm -rf restore-sandbox/full && mkdir -p restore-sandbox/full && tar -xf backups/2026-06-25/site.tar -C restore-sandbox/full && diff -u expected/app/config.yml restore-sandbox/full/app/config.yml
Find Missing Files in an Old Backup
The fastest failed restore drill is the one that finds missing critical files early.
cd restore-dr && tar -tf backups/2026-06-24/site.tar | sed 's#^./##' | sort | comm -23 required-files.txt -
List Archive Contents Before Extracting
You can inspect a tar backup before it writes a single file.
cd restore-dr && tar -tf backups/2026-06-25/site.tar | sed 's#^./##' | sort
Study mapping
Use this as independent command practice: read the notes, predict the output, then compare it with the example before using a real shell.
Useful for
- LPIC-1 style command-line practice
- LFCS style performance tasks
- Linux+ style troubleshooting review
Independent study support only. No affiliation, endorsement, exam dumps, or real exam questions.