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Intialize git repostiory
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Two tree architecture and Three tree architecture
Best basic practices for writing commit messages
Viewing the commit logs
Git Basic WorkFlow
What is HEAD pointer in GIT
Git Configuration
Viewing history

let update a file

naveen@naveen:/var/www/html/RND/symfony_sites/symfony_todoapp$ gedit readme.txt

I add extra line in a file "Update comment" Lets check a status

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

Git Display

On branch master
Changes not staged for commit:
  (use "git add ..." to update what will be committed)
  (use "git checkout -- ..." to discard changes in working directory)

    modified:   readme.txt

Only add Updated file to staging

naveen@naveen:/var/www/html/RND/symfony_sites/symfony_todoapp$ git add -u

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

Git Display

On branch master
Changes to be committed:
  (use "git reset HEAD ..." to unstage)

    modified:   readme.txt

Now see the history

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

Git Display

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