Getting started

git config --global user.name "Your Name"
git config --global user.email "your_email@whatever.com"

Create a repository

mkdir test
cd test
git init

Create a files

Use your favourite text editor to create a file in the test directory.

We will assume it is called file1.txt

Add the file so that git knows it exists

git add file1.txt

Commit the changes to git

git commit -a -m "Some message about the file"

When you commit the file you must include a comment

If you don't do this on the command line you will be taken to an editor - by default this will be vi (a rather non-intuitive editor). You can override this with the command:

git config --global core.editor myeditor

See what has been logged by git

git log
git status

Edit the file

Use your editor to make some changes to the file

See the differences between the new file and the old file:

git diff file1.txt

See what has been logged by git

git log
git status

Commit the changes

git commit -a -m "Some message about the changes"

See what has been logged by git

git log
git status

Undoing a commit

git revert HEAD

Get an older version

Get the hash of an older version

git log
git checkout HASH-NUMBER
cat file1.txt

Get back to the latest version

git checkout master

Create a branch

List existing branches

git branch

Create a new branch

git checkout -b newbranch

Merge the changes into the main branch

git checkout master
git merge newbranch

Tagging

git tag v1

Removing a tag

git tag -d v1

Back