Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to push your local commits to a remote repository and get: ! [rejected] —

If you see “fatal: remote origin already exists” when trying to git remote add origin

Fix Git SSL Certificate Problem: Unable to Get Local Issuer
If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...

Fix Git 'index.lock' File Exists Error on Linux
When working with Git on Linux, you might see an error like:
fatal: Unable to creat...

Fix Git Lock File Not Deleted After Crash
If Git reports a lock file error after a crash, it usually means a previous Git operation was int...

Fix Git Clone Connection Timed Out Due to Proxy Settings
You run git clone https://github.com/example/repo.git and after a long pause you get...