Git rollback latest changeset

In git to rollback the latest changeset, you do a git reset hard and specify the commit ID of the changeset before that.

For example suppose your latest commit id is fd1793a0a8366bdd48a85f7afe4fe26339f1149c. And the commit id of the previous commit is a6755301e8b283a0c7191028bb7611feff003cdd. To roll back fd1793a0a8366bdd48a85f7afe4fe26339f1149c this is what you do

git reset --hard a6755301e8b283a0c7191028bb7611feff003cdd

This points your Head to a6755301e8b283a0c7191028bb7611feff003cdd, effectively rolling back fd1793a0a8366bdd48a85f7afe4fe26339f1149c.

Useful Git Commands

Show git global (user level) configuration information

git config --global --list  

Create global (aka user level) settings

git config --global user.name "Vivek Menon"                               
git config --global user.email "vivekmenon@dotnetanalysis.com"  

Set notepad++ as the default editor for git (works in windows 64 bit)

git config --global core.editor "'C:/Program Files (x86)/Notepad++/notepad++.exe' -multiInst -notabbar -nosession -noPlugin"  



Create a git repository

git init  


View Pending Changes

git status 

Add a new file (stage a new file) named play.txt to git

git add play.txt

Add all the untracked files into git in one command

git add * 

Stage all existing files that has been updated

git add -u

Commit changes to local repository

git commit -m "adding a new file"

Stage and commit in one single command

git commit -am "my comment"

Show history

git log 

(latest changes show up on the top)
(type q to exit)


Show difference between the last two commits

git diff Head~1 Head

(Head is the latest commit. Head~1 means one before the latest)


Delete a file hello.txt  

git rm hello.txt                          (stage for deletion)
git commit -m "delete hello.txt" (commit deletion)


Get back the deleted file hello.txt

do git log to see all the commits 

do git checkout <SHA-1 hash of the commit I need> hello.txt

Undo all changes that have not been staged or committed

git reset --hard