day1.txt

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8105843520
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Demo - Laptop + Github.com
Lab - Laptop + Github.com
================================
Start @ - 9:30 AM IST - 5:30 PM IST
================================
Lunch Time - 1:00  - 2:00 PM
================================
2 Break - Tea - Coffee - Rest - 15 mins each
--------------------------------------------
11:30 - for 15 mins
3:30 - for 15 mins
==================================
During Demo - 
==================================================
What is Git?
=========================
	Source Code mgmt tool
	Versioning Tool for the code
	Open Source
	Free
	Compat with All OS.
	Written in C.+++
	Written by Linus Tovarld
		- Father of LINUX.
		- Reason for git - Bitkeeper (Distributed version control system)
	Apache2 License
	2004*** First release
	is DISTRIBUTED

What is Versioning?
-------------------
	I want to know some info on the CODE?
	--------------------------
	When this code was written?
	What code has been written?
	Who has written?
	Where a code is located?
	Why this code is written?
======================
V1.txt V2.txt V3.txt ==> 

What is Code?
-------------------------
Can be open with NOTEPAD.
	css html java python js .txt

What is Not Code?
-------------------------
	Images, PDF, Movie, Doc

===================================================
Other tools - 
OS & Free - RCS -> CVS -> SVN -> GIT
Prop -> VSS -> Perforce -> ClearCase -> TFS -> AzureDevOps -> Mercury
===================================================
GIT IS TRULY DISTRIBUTED
	     -----------
===================================================
Who can use git?
----------------
	ANY ONE and Everyone who wants...
			When this code was written?
			What code has been written?
			Who has written?
			Where a code is located?
			Why this code is written?
==============================================================

What is Server-Client?
--------------------
OS & Free - RCS -> CVS -> SVN 
Prop -> VSS -> Perforce -> ClearCase -> TFS -> Mercury

What is DISTRIBUTED?
--------------------
Git

========================================================
========================================================
How to install git?
==============================
	https://git-scm.com/downloads/guis
	WINDOWS - EXE - https://git-scm.com/ 
			- git gui	 - Ok for basic visualization
			- git bash	- very good tool. git + basic linux commands in windows.	
			- git cmd [ Dep ]
			
	MAC - DMG - https://git-scm.com/
	LINUX - 
		Exec
		Repo Based
			DEBIAN - sudo apt-get install git -y
			RHEL - sudo yum install git -y
==============================================================
Lab - 15 mins
==============================================================
==============================================================
Workflow 
	Add a file(s)
	Change a file(s)
	Delete a file(s)
	version a file
	See a history

Basic Workflow in Git?
=========================================
Step 1 - Create a Repo [ ONE time ]
$ git init

Step 2 - Create a file(s) in Workspace using editor

Step 3 - Add a file to GIT repo [ Add a file from Working dir to Staging area] 
$ git add file1.java

[ONE TIME]
$ git config user.name "Rajesh Kumar"
$ git config user.email "devops@rajeshkumar.xyz"
$ git config --list

Step 4 - Commit a file to Git repo [ From Staging area to Repo ]
$ git commit -m"First Code for Demo"

Rajesh Kumar@DESKTOP-6KRAAR8 MINGW64 /e/vesta/repo1 (master)
$ git commit -m"First Code for Demo"
[master (root-commit) 19f5b07] First Code for Demo
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 file1.java

Step 5 - See a history/version 
$ git log
$ git show 19f5b0703006a776b8097ae2dc7811220261dfd6

=========================================
$ git log
commit 19f5b0703006a776b8097ae2dc7811220261dfd6 (HEAD -> master)
Author: Rajesh Kumar <devops@rajeshkumar.xyz>
Date:   Thu Jul 23 11:52:19 2020 +0530

    First Code for Demo
=========================================
What is 19f5b0703006a776b8097ae2dc7811220261dfd6?
	- a 40 Char universal uniq ID - 
	- Called CHECKSUM aka commit-id aks revision
	- SHA1
	- Link to the CODE which you commited in repo.
	- Size of each commit can be anything.
	- each commit ID has parent ID [ RelationShip]
	tecnology - Object Storage
			- Google Drive		
			- S3
			- git
			- Docker
==============================================
What is Staging area?? and where is that?

Working Dir - A Place where you write/change a code.
		- /e/vesta/repo1

Staging Area - A Place where you can 
		- SEE DIFf Between WORKSPACE and REPO
		- Help you to send a file from WorkSpace to repo.
		- - /e/vesta/repo1/.git/index
		- git status

Repo - A Place where you store a version after a commit.
		- /e/vesta/repo1/.git/objects

================================================


==================Finalizing a place to work with versioning==============================

509  cd /e
  510  pwd
  511  start .
  512  cls
  513  clear
  514  mkdir vesta
  515  cd vesta/
  516  mkdir repo1
  517  ls
  518  cd repo1/
  519  clear
  520  pwd
  521  start .
  522  clear
  523  ls
  524  history
=================Basic work flow===============================

 527  git init
  528  start .
  529  touch file3.css
  530  touch file4.js
  531  clear
  532  ls
  533  git add file1.java
  534  git config user.name "Rajesh Kumar"
  535  git config user.email "devops@rajeshkumar.xyz"
  536  git config --list
  537  clear
  538  git commit -m"First Code for Demo"
  539  clear
  540  git log
  541  git show 19f5b0703006a776b8097ae2dc7811220261dfd6
  542  history
  543  clear
  544  git log
  545  pwd
  546  cd .git/
  547  pwd
  548  clear
  549  pwd
  550  ls
  551  cd index
  552  sl
  553  clear
  554  ls
  555  cd objects
  556  ls
  557  clear
  558  ls
  559  cd ..
  560  clear
  561  ls
  562  cd ..
  563  ls
  564  clear
  565  git log
  566  git show 19f5b0703006a776b8097ae2dc7811220261dfd6
  567  clear

==================Status -- Staging area==============================
 571  git status
  572  clear
  573  git status
  574  ls
  575  clear
  576  git add .
  577  git status
  578  ls
  579  clear
  580  git status
  581  git commit -m"adding all files"
  582  clear
  583  git status
  584  ls
  585  clea
  586  clear
  587  vi file1.java
  588  git status
  589  git add .
  590  git status
  591  git commit -m"adding a file changed in file1.java"
  592  clear
  593  git status
  594  ls
  595  git log
  596  clear
  597  history

============================================
============================================
Qs - 
How to rename a file?
How to commit a dir?
How to move a file from one location to another location?
How to add all file but commit only selected file?

How to delete files?
How to delete dir?
How to get back to the stage of before deleted file?


-------ADD a New file/content---------
git add 
git commit
----------------

-------Rename a New file---------
Rename manually	# git mv fileaname1.txt filename2.txt
git add 	# git mv fileaname1.txt filename2.txt
git commit
or 
git mv fileaname1.txt filename2.txt
git commit
----------------

 628  git status
  629  clear
  630  ls
  631  git mv file4.js file44.js
  632  git status
  633  git commit -m"renmaing a file"
  634  clear
  635  git status
  636  ls
  637  clear
  638  ls
  639  mkdir src
  640  clear
  641  ls
  642  git status
  643  touch file5.txt
  644  git status
  645  clear
  646  ls
  647  git status
  648  touch src/file6.txt
  649  clear
  650  git status
  651  git add .
  652  clear
  653  git status
  654  git commit -"selective commit" src/file6.txt
  655  clear
  656  git commit m-"selective commit" src/file6.txt
  657  git commit -m "selective commit" src/file6.txt
  658  git status
  659  clear
  660  ls
  661  git status
  662  ls
  663  git mv file2.py  src/
  664  clear
  665  git status
  666  git commit -m"move a file location"
  667  ls
  668  git status
  669  clear
  670  git status
  671  clear
  672  ls
  673  git rm file1.java
  674  git status
  675  ls
  676  clear
  677  git status
  678  ls
  679  git commit -m"deleting file"
  680  git status
  681  clear
  682  ls
  683  clear
  684  git log
  685  ls
  686  git log
  687  git log --oneline
  688  clear
  689  git log --oneline
  690  ls
  691  clear
  692  git status
  693  git log --oneline
  694  git checkout dc1729f
  695  clear
  696  ls
  697  git checkout master
  698  ls
  699  git log --oneline
  700  clear
  701  git log --oneline
  702  git checkout 19f5b07
  703  ls
  704  clear
  705  git checkout 19f5b07
  706  git checkout master
  707  ls
  708  git checkout 19f5b07
  709  clear
  710  ls
  711  git checkout master
  712  clear
  713  history


=================
vi - editor - default in linux
Mode - 
	Read only (Default)	- Save and QUIT 
					exit without
					:q!
					exit and saving
					:wq
	Insert Mode --- press i - Write
=================
=====================================================================
Qs
------------
How do we share code with each other?
---------------------------------------
- Git allows you connect with any other remote repo using
	- ssh	[ Remote repo machine should be enabled with ssh and network ]
	- http  [ Remote repo machine should be enabled with http server and network ]

- To Send your commits from Local repo to remote repo - PUSH
	       -------
- To get commits fron remote repo to local repo - PULL
         -------

Basic workflow working with remote repo
===========================================
First time - Clone a remote repo
Seconds time onwards
- To Send your commits from Local repo to remote repo - PUSH	       -------
- To get commits fron remote repo to local repo - PULL
         -------


Enterprises started looking for
	- WIKI Integ with [Remote and Central Repo]
	- Issues tracking
	- Mul Org and Mul Projects
	- Role based Mach.
	- GUI
	- Abilility to manage mul repo.
------------------------
	GIT says- NO......We do not have this featuree

Startups in Git
============================
I would make GIT enterprise ready
- github
	cloud		- hosted for PUBLIC - Free + Paid
	enterprise 	- hosted for YOUR COMPANY WITHIN FIREWALL + Paid
- gitlab
- bitbucket
- Amazon
- Google
- microsoft
- Gerrit
================
	- Hosting platform	DONE
	- has Remote repo	DONE
	- has central repo	DONE
	- WIKI Integ with [Remote and Central Repo]
	- Issues tracking
	- Mul Org and Mul Projects
	- Role based access  mach
	- LDAP auth
	- GUI
	- Abilility to manage mul repo.
===================================================
Workflow working with Github
======================================

USER 1
===================
Step 1- Register at github cloud (github.com)

Step 2 - create a empty repo
https://github.com/devopsschool-demo-temporary/vestademo

Step 3 - Push your Existing repo
git push https://github.com/devopsschool-demo-temporary/vestademo.git master

USER 2
===================
Step 1- Register at github cloud (github.com)

Step 2 - Clone Team repo 

Step 3 - Create a file(s) in Workspace using editor

Step 4 - Add a file to GIT repo [ Add a file from Working dir to Staging area] 
$ git add file1.java

Step 5 - 
[ONE TIME]
$ git config user.name "Rajesh Kumar"
$ git config user.email "devops@rajeshkumar.xyz"
$ git config --list

Step 6 - Commit a file to Git repo [ From Staging area to Repo ]
$ git commit -m"First Code for Demo"

Rajesh Kumar@DESKTOP-6KRAAR8 MINGW64 /e/vesta/repo1 (master)
$ git commit -m"First Code for Demo"
[master (root-commit) 19f5b07] First Code for Demo
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 file1.java

Step 7 - See a history/version 
$ git log
$ git show 19f5b0703006a776b8097ae2dc7811220261dfd6

Step 8 - PUSH your commit to remote/central github repo


USER 1
===================
Pull a updated code from uSER2 from  remote/central github repo


USER1
-----------
 501  git push https://github.com/devopsschool-demo-temporary/vestademo.git master
  502  git log --oneline
  503  clear
  504  ls
  505  ls
  506  git pull origin master
  507  git remote add origin https://github.com/devopsschool-demo-temporary/vestademo.git
  508  git pull origin master
  509  ls
  510  history


USER2
-----------
 501  git clone https://github.com/devopsschool-demo-temporary/vestademo.git user2
  502  ls
  503  cd user2
  504  clear
  505  ls
  506  git log --oneline
  507  ls
  508  clear
  509  ls
  510  touch user2.txt;git add .;git commit -m"adding as a user2"
  511  git push origin master
  512  history