Basic introduce

Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.

Git is easy to learn and has a tiny footprint with lightning fast performance. It outclasses SCM tools like Subversion, CVS, Perforce, and ClearCase with features like cheap local branching, convenient staging areas, and multiple workflows.

We can learn the general knowledge onGIT We can get the detail information about git on the GIT pro

Basic practice


  • Linux

$ sudo apt-get install git-all

  • Mac

terminal click :
git clone

$ git If you don't have it, OSX will ask you to install XCode Developer tools:command line tools.

If you want a new version download it from the main Git site and install like any other mac app.

  • Windows

The best way to get started on Windows is to download Git for Windows

2.Configure,setting up local identity

Configure user's name, user's email ,in our case, it connect with gitlab

  $ git config "XXX"  
  $ git config "":

"mkdir" used to build a new folder; "touch"used to build a new file; "cd" used to open local file

$ cd /Users/douboy/Documents/gitlab
Initialized empty Git repository $ git init
Initialized empty Git repository in /Users/douboy/Documents/gitlab

3.Clone ,pull

  $ douboydeMacBook-Pro:gitlab douboy$ git clone
  Cloning into 'bob-wu'...
  remote: Counting objects: 670, done.
  remote: Compressing objects: 100% (48/48), done.
  remote: Total 670 (delta 64), reused 91 (delta 55)
  Receiving objects: 100% (670/670), 6.55 MiB | 1.11 MiB/s, done.
  Resolving deltas: 100% (378/378), done.
  $ douboydeMacBook-Pro:bob-wu douboy$ git pull origin master
  * branch            master     -> FETCH_HEAD
  Already up-to-date.

git pull :
$ git pull origin master

4.Stageing files: git add,git commit

git add --all (git add -A) git commit -m "write commit" ,you can write what you want in the part of "write commit"

  $ git add --all
  $ git commit -m "code"
  [master 0611cd9] code
  1 file changed, 16 insertions(+), 16 deletions(-)
  douboydeMacBook-Pro:bob-wu douboy$ git push
  Counting objects: 5, done.
  Delta compression using up to 4 threads.
  Compressing objects: 100% (5/5), done.
  Writing objects: 100% (5/5), 642 bytes | 642.00 KiB/s, done.
  Total 5 (delta 4), reused 0 (delta 0)
    d1567a2..0611cd9  master -> master

5.git diff:Edit one or more files, then check what you changed since the last commit

  $ git diff test2.txt 
  diff --git a/test2.txt b/test2.txt
  index b0b9fc8..835f9c0 100644
  --- a/test2.txt
  +++ b/test2.txt
  @@ -1 +1,4 @@
  Another file
  +This is the new content of the file

6.git rm:removing files

  $ git rm test.txt
  rm 'test.txt'
  $ git status
  On branch master
  Changes to be committed:
    (use "git reset HEAD <file>..." to unstage)
      deleted:    test.txt

7.git log

  git log: Looking at the commit history

8.git push: Push the local data to gitlab

The following is the structure of local operation


  1. git push Please make sure you have the correct access rights

    sh-3.2$ git config "user name"
    sh-3.2$ git config "user email"
    sh-3.2$ git add --all
    sh-3.2$ git commit -m "update "
    [master b0739b3] update
    1 file changed, 1 insertion(+)
    sh-3.2$ git push origin master
    remote: ========================================================================
    remote: You are not allowed to push code to this project.
    remote: ========================================================================
    fatal: Could not read from remote repository.
    Please make sure you have the correct access rights
    and the repository exists.

There is no ssh key in gitlab . we need build ssh in local and then update in gitlab

  sh-3.2$ ssh-keygen -t rsa -C "user email"
  Generating public/private rsa key pair.
  Enter file in which to save the key (/Users/douboy/.ssh/id_rsa): 
  /Users/douboy/.ssh/id_rsa already exists.
  Overwrite (y/n)? y
  Enter passphrase (empty for no passphrase): 
  Enter same passphrase again: 
  Your identification has been saved in /Users/douboy/.ssh/id_rsa.
  Your public key has been saved in /Users/douboy/.ssh/
  The key fingerprint is:
  The key's randomart image is:
  +---[RSA 3072]----+
  |        +..+     |
  |     .   =. +    |
  |      o o oo +   |
  |     o = o .+.E=+|
  |    . = S .+ +Bo*|
  |     o .  + =+.o.|
  |        . .=. +  |
  |       ...+. = . |
  |      .. o..*.   |

  sh-3.2$ cat ~/.ssh/
  ssh-rsa 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

copy ssh to gitlab ssh key

Then run git push again

  sh-3.2$ git push origin master
  Enter passphrase for key '/Users/douboy/.ssh/id_rsa': 
  Enumerating objects: 5, done.
  Counting objects: 100% (5/5), done.
  Delta compression using up to 4 threads
  Compressing objects: 100% (3/3), done.
  Writing objects: 100% (3/3), 287 bytes | 287.00 KiB/s, done.
  Total 3 (delta 2), reused 0 (delta 0), pack-reused 0
    65050a4..b0739b3  master -> master

2.git pull and covery local coding,
some time local coding update to new version and online coding new version, so the version conflicts. the following would use online version to covery local

    git fetch --all   //git all data from online
    git reset --hard origin/master   //(master would change according to real condition of branch)
    git pull   //pull again


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