Slide for the talk on "getting started with git" I gave at Paytm.

1. Getting started with
GIT

2. Content
● Why do we need git?
● VCS
● CVCS,DVCS
● History of git
● 3 states/areas of git
● How git is so fast
● How git stores commits?
● Git branches, merge vs re-base
● Configs in git
● Local
● Global
● System
● Git basic commands clone/init,add,commit,pull,push
● Git ignore,blame,stash,squash,diff
● Contributing to github

3. Why do we need Git?
C++

4. Why do we need Git?
Node.js

5. ● I needed a VCS (Version control system)

6. Why do we need Git?
Node.js
V 1.1
Node.js
V 1.2
Node.js
V 1.3

7. Why do we need Git?
Git is a VCS.

8. Why do we need Git?
I just attended
a mooc on
programming for
noobs
Node.js

9. Why do we need Git?
● Problem was to keep the code in sync at some
common place.
● We needed a Centralized version control system
(CVCS) or a Distributed version control system
(DVCS)

10. DVCS vs CVCS
● CVCS
● Users have the latest snapshot
of code
● There is only one remote
● DVCS
● Users have the whole history of
code
● There can be multiple remotes

11. Bit about history
● Creator of git ?
● Till 2002 linux code and patches
were passed through archives.
● Then they started using a DVCS
called bitkeeper.
● In 2005 relationship bw bitkeeper
and linux community broke.
● On a sunny Sunday of April, linus
laid the foundation of git.

12. 3 areas of git
● Git directory
– Committed code
● Working area
– Uncompressed latest
snapshot from git
directory
● Staging area

13. How git is so fast
● Snapshots not
pointers

14. How git stores commits?
Commit = pointer to the snapshot of staged content +
author, date, other meta data + parent commit
pointer(s) (=<0).

15. Git branches
● Represents an independent line of development
● A brand new set of working,staging and git directory.
● Creating new branch
● Merging branches
● Rebase
● Merge vs Rebase
● Diff in branches

16. Git configs
● Lets you get and set configuration variables that
control all aspects of how Git looks and operates.
● Types of configs
● Local config (.git/config)
● Global config (~/.gitconfig)
● System config (/etc/gitconfig file)
● git config -l –system/global/local
● git config --local user.email

17. Basic commands
● Clone
– Allows you to pull the git directory from remote to your machine.
● Status
● Add
– Add files to staging area
– Unstaging staged files (reset and rm –-cached)
● Commit
● Pull
● Pull vs fetch
● Push

18. And some more...
● ignore
– gitkeep
● blame
● stash
● diff
● git rm
● git log and gitk
● git checkout
● git grep
● checkout vs reset

19. Contributing on github
● Fork
● Commits in my remote
● Multiple remotes use case
● Pull request