Hosting Operations
Risk: safePreview the Patch a Rollback Would Apply
You know the last good release tag, but you want to inspect what a rollback would remove before changing anything.
Command
cd /lab/git-recovery-rollback && git diff --stat HEAD..release-2026-06-25-1000Before you run this
Risk: safe. Do not treat a small diff as automatically safe; migrations, config, and external state still need review.
Expected output
A diffstat showing the config, migration, public page, and release metadata changes that rollback would remove.
System impact
Nothing changes. Git prints the patch summary from the current commit back to the last good release.
Recovery / rollback: no state is changed.
When to use it
Use before reset, revert, or deploy rollback when you need a quick preview of the files and line counts involved.
When not to use it
Do not treat a small diff as automatically safe; migrations, config, and external state still need review.
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 /work/git-recovery-rollback && git diff --name-status HEAD..release-2026-06-25-1000
M app/config.yml
D db/migrate.sql
M public/index.html
D releases/2026-06-25-1030/VERSION$ cd /work/git-recovery-rollback && git diff --stat HEAD..release-2026-06-25-1000
app/config.yml | 4 ++--
db/migrate.sql | 1 -
public/index.html | 2 +-
releases/2026-06-25-1030/VERSION | 2 --
4 files changed, 3 insertions(+), 6 deletions(-)View reproducible demo details
This page shows the sanitized shell transcript and the setup steps needed to reproduce the example.
Lab setup steps
cd /lab/git-recovery-rollback && git diff --name-status HEAD..release-2026-06-25-1000cd /lab/git-recovery-rollback && git diff --stat HEAD..release-2026-06-25-1000
next steps
Related commands
Show Files Changed Since Last Good Release
Compare the suspect release against the last known-good tag.
cd /lab/git-recovery-rollback && git diff --name-status release-2026-06-25-1000..HEAD
Restore One File From Last Good Release
Recover a config file without rolling back the whole branch.
cd /lab/git-recovery-rollback && git restore --source=release-2026-06-25-1000 -- app/config.yml
Revert the Suspect Release Commit
Undo a bad release with a new commit instead of rewriting history.
cd /lab/git-recovery-rollback && git restore -- app/config.yml && git revert --no-edit release-2026-06-25-1030
Map Recent Release Commits
A rollback is easier when the last few release tags are visible.
cd /lab/git-recovery-rollback && git log --oneline --decorate --graph --all -8
Snapshot Git Status Before Recovery
Before rollback commands, capture the branch and dirty files.
cd /lab/git-recovery-rollback && git status --short --branch
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.