Git Installation and basics

Installing Git is very easy. Since git is developed Linus who developed Linux OS, git comes by default with the new versions of Linux.

[root@vx111a Downloads]# yum install git*

Loaded plugins: langpacks, product-id, subscription-manager

This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.

Resolving Dependencies

--> Running transaction check

---> Package git.x86_64 0:1.8.3.1-4.el7 will be installed

--> Processing Dependency: perl-Git = 1.8.3.1-4.el7 for package: git-1.8.3.1-4.el7.x86_64

--> Processing Dependency: perl(Git) for package: git-1.8.3.1-4.el7.x86_64

--> Running transaction check

---> Package perl-Git.noarch 0:1.8.3.1-4.el7 will be installed

--> Finished Dependency Resolution

Dependencies Resolved

Once the installation is done ,we can test the git using,

[root@vx11a] git –version

Git version 1.8.3.1

If we see the git version printed, we can confirm the installation is good. We can also use

[root@vx11a] whereis git : Which gives us the git binary location.

Create a Git Repo

Creating a Git repo is very easy. Run the “git init” on a new directory after creation. The Git Repository is then initialized with the below structure.

The .git is a hidden directory which is actually our local repository. The above snap shot gives us more details about the contents of the .git directory.

Now once the repository is created. We need to add files and commit them.

Add a file to the Local Git Repository

Create a java file as

[root@vx111a Mytest]# cat hai.java

public class hai {

 public static void main(String st[]) {

    System.out.println("This Is Git Sample");

}

}

Now once the file is created, we need to add them to the git repository by using

Before adding the file to the git repository ,we can check the status using

[root@vx111a master]# git status
# On branch master
#
# Initial commit
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#    hai.java
nothing added to commit but untracked files present (use "git add" to track)

We can see that a new untracked file “Hai.java” exists. Now lets add the file using

[root@vx111a master]# git add . ( or git add <file Name>

The file is now added to the git repository. Now lets see the status

[root@vx111a master]# git status
# On branch master
#
# Initial commit
#
# Changes to be committed:
#   (use "git rm --cached <file>..." to unstage)
#
#    new file:   hai.java
#

We can now see that there is no untracked file. Once the file is added, we then need to make a commit to the repository so that the changes will be available to the remote server when we make a push to that. Once the changes are available at the remote server, other develops can then communicate and get the updated files.

Commit to GIT

Committing files to git is done by the git commit command like

[root@vx111a Mytest]# git commit -m "testing GIT"

[master (root-commit) bad4374] testing GIT

 2 files changed, 6 insertions(+)

 create mode 100644 Hai.java

 create mode 100644 ReadMe

We can see that files, Hai.java and ReadMe files are both committed to the Git Repository.

More to Come J