LinuxSysAdminsDoc/readme.md

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# Git
![GitHub Logo](img/image.jpg)
## Usefull links
[Git Cheat Sheet](https://education.github.com/git-cheat-sheet-education.pdf)
## Git System
![Git System](img/Git_Guide.png)
## Remote Execution
![Remote Execution](img/Remote_execution.png)
## Basic commands
=================
### Initialize an existing directory as a Git repository
```bash
$ git init
Initialized empty Git repository in C:/Users/Admin/Documents/Git/.git/
```
### Show modified files in working directory, staged for your next commit
```bash
$ git status
On branch master
No commits yet
Untracked files:
(use "git add <file>..." to include in what will be committed)
Readme.md
image.jpg
nothing added to commit but untracked files present (use "git add" to track)
```
### Add a file as it looks now to your next commit (stage)
```bash
$ git add Readme.md image.jpg
```
### Commit your staged content as a new commit snapshot
```bash
$ git commit -m "First Commit"
[master (root-commit) 784ae2e] First Commit
Committer: unknown <Admin@FOR209-03.irisib.lan>
Your name and email address were configured automatically based
on your username and hostname. Please check that they are accurate.
You can suppress this message by setting them explicitly:
git config --global user.name "Your Name"
git config --global user.email you@example.com
After doing this, you may fix the identity used for this commit with:
git commit --amend --reset-author
2 files changed, 61 insertions(+)
create mode 100644 Readme.md
create mode 100644 image.jpg
```
### Set a name & email that is identifiable for credit when review version history
```bash
$ git config --global user.name “[firstname lastname]
$ git config --global user.email “[valid-email]
```
### Show all commits in the current branchs history
```bash
$ git log
commit 784ae2e2d10720c23eb7cebdf8386ef2157fe628 (HEAD -> master)
Author: unknown <Admin@FOR209-03.irisib.lan>
Date: Thu Apr 1 12:11:34 2021 +0200
First Commit
```
## SHARE & UPDATE
### Retrieving updates from another repository and updating local repos
=================================
add a git URL as an alias
>git remote add [alias] [url]
fetch down all the branches from that Git remote
>git fetch [alias]
merge a remote branch into your current branch to bring it up to date
>git merge [alias]/[branch]
Transmit local branch commits to the remote repository branch
>git push [alias] [branch]
>git pull
fetch and merge any commits from the tracking remote branch
## BRANCH & MERGE
### Isolating work in branches, changing context, and integrating changes
![Remote Execution](img/Branching.png)
>git branch
list your branches. a * will appear next to the currently active branch
>git branch [branch-name]
create a new branch at the current commit
>git checkout
switch to another branch and check it out into your working directory
>git checkout -b|-B <new_branch> [<start point>]
Specifying -b causes a new branch to be created as if git-branch(1) were called and then checked out.
If -B is given, <new_branch> is created if it doesnt exist; otherwise, it is reset. This is the transactional equivalent of
>git merge [branch]
merge the specified branchs history into the current one
>git log
show all commits in the current branchs history
## TRACKING PATH CHANGES
### Versioning file removes and path changes
=================================
Delete the file from project and stage the removal for commit
>git rm [file]
Change an existing file path and stage the move
>git mv [existing-path] [new-path]
Show all commit logs with indication of any paths that moved
>git log --stat -M
### History
```bash
history
1 git init
2 git status
3 git add Readme.md image.jpg
4 git status
5 git commit -m "First Commit"
6 git config --global user.name vl4dd
7 git config --global user.email ticus@kraland.net
8 git commit -m "First Commit"
9 git status
10 git log
11 git commit -m "Second commit"
12 git add Readme.md
13 git commit -m "Second commit"
14 git log
```
###
Checker le satus
> git status
Ajouter un element dans la branche
> git add Readme.md
Commit les changement
> git commit -m "First commit"
Show all commit
>git checkout
Merge
>git merge
## Setup
### Configuring user information used across all local repositories
>git config --global user.name “[firstname lastname]”
set a name that is identifiable for credit when review version history
>git config --global user.email “[valid-email]”
set an email address that will be associated with each history marker
>git config --global color.ui auto
set automatic command line coloring for Git for easy reviewing
### Saving your uncommitted work for a quick fix then getting it back
>git stash
temporarily stash your work since your last commit
>git stash pop
fetch your stashed work to continue it
$ git stash pop stash@{2}
in case you want to apply a specific Stash item (not the most recent one), you can provide the index name of that item in the "pop" option
### Rewriting history
>git commit --amend -m "New commit message"
replace the last commit
>git commit --amend --no-edit
replace the last commit without changing the commit message
>git rebase -i {branch}
take the precedent commit and add it to your branch
### Ignoring files
>touch .gitignore && echo {what you want to ignore} >> .gitignore
create a file and specify what (extensions, directories, files) to ignore in it
>git rm --cached {fileignored}
remove from the tracking index a file that should be ignored but wasnt because already tracked when the ignore rule was created