Previous Git Blogs

1. Intialize git repostiory
2. First Commit
3. Two tree architecture and Three tree architecture
4. Best basic practices for writing commit messages
5. Viewing the commit logs
6. Git Basic WorkFlow
7. What is HEAD pointer in GIT
8. Git Configuration
9. Viewing history
10. Updating a file and adding it to repository

 naveen@naveen:/var/www/html/RND/symfony_sites/symfony_todoapp$ git log 

commit 34d195335ce1093085045cb148bb1765f4b01a79
Author: naveenkumar 
Date:   Wed Dec 16 11:16:07 2015 +0530

    Update comment added

commit e95efc2d8e94f72f13e1b578b1d80451e8cf2ac8
Author: naveenkumar 
Date:   Wed Dec 16 10:49:52 2015 +0530

    Readme file added

commit a67edfaa870430ae58dd6d6e8cea68f0c9a08c0a
Author: Naveen 
Date:   Mon Dec 14 13:44:18 2015 +0530

    my initial commit

Most recent commit will always br on top

If I want to find out what has changed between these commits I can use

 git diff

naveen@naveen:/var/www/html/RND/symfony_sites/symfony_todoapp$ git diff e95efc..34d195

Note : e95efc & 34d195 is a first 6 charcters of commit id

diff --git a/readme.txt b/readme.txt
index 2ba180a..bda49b4 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1 +1,2 @@
 Please Read me
+MY new changes

+MY new changes this text has been added as it got + sign on front of it

always Working with SHA~1 hashes could be difficult there are other ways we could do the same

The lates commit is known as HEAD, and I can go back prevoius commit with using tilt HEAD~1 i.e one commit back from the HEAD, So we can do

naveen@naveen:/var/www/html/RND/symfony_sites/symfony_todoapp$ git diff HEAD~1..HEAD

diff --git a/readme.txt b/readme.txt
index 2ba180a..bda49b4 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1 +1,2 @@
 Please Read me
+MY new changes

This also works

naveen@naveen:/var/www/html/RND/symfony_sites/symfony_todoapp$ git diff HEAD~1..

diff --git a/readme.txt b/readme.txt
index 2ba180a..bda49b4 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1 +1,2 @@
 Please Read me
+MY new changes