Git allows a team of people to work together, all using the same files. And it helps the team cope with the confusion that tends to happen when multiple people are editing the same files.
Using git we can travel to different versions of the files in easy way.
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Creating a directory and making it as git repository using git init command.
[test@server1 ~]$ mkdir g1
[test@server1 ~]$ cd g1
[test@server1 g1]$ git init ----> it makes a directory as git repository .
Initialized empty Git repository in /home/test/g1/.git/
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After that first time users should give Their name and email id to git using the following way.
[test@server1 g1]$ git config --global user.name "test"
[test@server1 g1]$ git config --global user.name "test@localhost"
[test@server1 g1]$ ls
[test@server1 g1]$ ls -la
total 12
drwxrwxr-x 3 test test 4096 Mar 28 16:28 .
drwx------ 12 test test 4096 Mar 28 16:28 ..
drwxrwxr-x 7 test test 4096 Mar 28 16:28 .git
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Here we will check how git works by doing a simple example using as below
create a index.html file then add it to to git repository to track the file.
[test@server1 g1]$ vi index.html ---> creating a file inside git repositry
[test@server1 g1]$ git add index.html ---> add it to repository track it
[test@server1 g1]$ git status --> This command shows the status of git repository as number of files are in tracking
# On branch master
#
# Initial commit
#
# Changes to be committed:
# (use "git rm --cached <file>..." to unstage)
#
# new file: index.html
#
[test@server1 g1]$ git commit ---> This command save the changes by give a message and commit.
[master (root-commit) c097834] updating
1 files changed, 1 insertions(+), 0 deletions(-)
create mode 100644 index.html
--->It will show the log message as how many log files are there for a file which was commited.
[test@server1 g1]$ git log
commit c097834da5f9f54aa4f08cb253aae41f5557e77b
Author: test <test@localhost>
Date: Tue Mar 28 16:29:36 2017 +0530
updating
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Now change the content of the index file and add to the repository and commit it.by below
[test@server1 g1]$ vi index.html --Change the content
[test@server1 g1]$ git add index.html
[test@server1 g1]$ git commit -m "update second time"
[master b0e8a8f] update second time
1 files changed, 2 insertions(+), 0 deletions(-)
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check the git log to get the previous version file.It will shows the commit id which is help full to go the previous version of the file.
[test@server1 g1]$ git log
commit b0e8a8ffb442dcb86b4cc4481e29e3ab42e256f2
Author: test <test@localhost>
Date: Tue Mar 28 16:31:29 2017 +0530
update second time
commit c097834da5f9f54aa4f08cb253aae41f5557e77b
Author: test <test@localhost>
Date: Tue Mar 28 16:29:36 2017 +0530
updating
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get the required modification file using commit id from git log using git checkout command as following
[test@server1 g1]$ more index.html
This is the git file
This is a modification doing second time
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Here you can observe that content of index file.
[test@server1 g1]$ git checkout c097834da5f9f54aa4f08cb253aae41f5557e77b -- index.html
[test@server1 g1]$ more index.html
This is the git file
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By using the commit id we can travel different versions of the git as below
[test@server1 g1]$ git checkout b0e8a8ffb442dcb86b4cc4481e29e3ab42e256f2 -- index.html
[test@server1 g1]$ more index.html
This is the git file
This is a modification doing second time
