Short introduction about vcs & git usage. Aimed to introduce concept of version control system and git to people who didn't used git or vcs yet. Doesn't introduce deep part of git or operating policy for git. Just focus on simple introduction about main functionality and abstracted internal design.

1. DO YOU WANNA USE A VCS
SeongJae Park <sj38.park@gmail.com>

2. Software Is Alive: Keeps Changing
“How To Keep Software’s Moment?”

3. Life Of Files
FileA ver 0
FileB ver 0

4. Life Of Files
FileB Changed
FileA ver 0
FileB ver 1

5. Life Of Files
FileA Changed
FileB ver 1
FileA ver 1

6. Life Of Files
FileB Changed Again
FileA ver 1
FileB ver 2

7. Software Is Alive: Keeps Changing
“How To Keep Software’s Moment?”
$ ls
0213_1st.tar
0239_2nd.tar.gzip
0305_final.zip
0307_final2.alz

8. VCS: Version Control System
Help Versioning, History Managing

9. VCS: Version Control System
Help Versioning, History Managing
Get Back Specific Version’s Software Anytime

10. CVCS vs DVCS
Centralized vs Distributed
Not Detail This Time…
Just Remember, CVCS is EVIL

11. git
Distributed Version Control System
Developed For Kernel SCM By Linus Torvalds
“Only wimps use tape backup: real men just upload their important stuff on ftp,
and let the rest of the world mirror it ;)” - Linus Torvalds
Just Remember: Cool Programmer Uses GIT

12. GIT, ALONE AND FREE
“Yes, I’m Alone, But I’m Alone And Free”
- Frozen -

13. git init: Create Repository
$ mkdir olaf && cd olaf && git init
`pwd` Is Now A Git Repository
Can Version Control Files Inside `pwd` Now

14. git add: Add Files Under Git’s Admin
$ echo “warmhug” > favor && git add favor
They Will Be One Of Version Later

15. git status: Show Git’s Admin Status
$ git status
$ echo “anna” >> favor
$ git status
Changed? Deleted? Be Conflicted?

16. git commit: Make Version
$ git commit -m “add warmhug as favor”
Already Added Files Are New Version, Now

17. git log: Show History
● Development Cycle
○ While(!blamed) {Analysis(); Develop(); Blame();}
Useful For Blaming ;)

18. git branch: Manage Branches
git branch;
git branch more_favor;
git branch;

19. git checkout: Move To Other Branch
git
git
git
git
git
git
checkout more_favor
branch
commit -am “add anna as favor, too”
log
checkout master
log

20. git checkout: Move To Commit
$ git checkout d8ec26
Branch Is Just Name Of Ref To Commit

21. Life Of Files Under Git, Internal
FileA ver 0
FileB ver 0

22. Life Of Files Under Git, Internal
git commit
commit 1
FileA ver 0
FileB ver 0

23. Life Of Files Under Git, Internal
HEAD
git branch
commit 1
FileA ver 0
FileB ver 0
master
branch

24. Life Of Files Under Git, Internal
HEAD
FileB Changed
master
branch
commit 1
FileA ver 0
FileB ver 0
FileB ver 1

25. Life Of Files Under Git, Internal
HEAD
git commit -a
commit 1
FileA ver 0
FileB ver 0
master
branch
commit 2
FileB ver 1

26. Life Of Files Under Git, Internal
HEAD
git commit -a
commit 1
FileA ver 0
FileB ver 0
master
branch
commit 2
FileB ver 1

27. Life Of Files Under Git, Internal
HEAD
Change FileA, FileB
git commit -a
commit 1
FileA ver 0
FileB ver 0
commit 2
FileB ver 1
master
branch
commit 3
FileA ver 1
FileB ver 2

28. Life Of Files Under Git, Internal
HEAD
git checkout -b newbranch
commit 1
FileA ver 0
FileB ver 0
commit 2
FileB ver 1
master
branch
newbranch
commit 3
FileA ver 1
FileB ver 2

29. Life Of Files Under Git, Internal
HEAD
Change FileA
git commit -a
commit 1
FileA ver 0
FileB ver 0
master
branch
commit 2
FileB ver 1
newbranch
commit 3
commit 4
FileA ver 1
FileB ver 2
FileA ver 2

30. GIT IS AN OPEN DOOR
“We Can Fix This Hand In Hand”
- Frozen -

31. Communication Between Repos
Git Repositories Can…
Clone
Push Commits To
Pull Commits From
Each Others

32. Protocol Between Repos
HTTP://
HTTPS://
GIT://
SSH://
Even Usual File System

33. git clone: Clone Other’s Repo
$ git clone /home/elsa/olaf

34. git remote: Manage Remote Repos
$ git remote
$ git remote add origin /home/elsa/olaf

35. git push: Push Changes To Remote
$ echo “carrot” > noise && git add noise
&& git commit -am “add noise”
$ git push

36. git pull: Fetch & Merge Changes
May Cause Conflict In Some Scenario
Remember To Make Things Clean Before Push

37. Free GIT Repo Hosting Service
● GitHub
○ Popular Service
○ Money For Private Repository
● Bitbucket
○ Less Than GitHub, But Popular
○ No Money For Private Repository

38. FAQ: When Commit?
One Commit For One Logical Change

39. FAQ: How To Revert?
git reset --soft HEAD^

40. FAQ: How To Revert Silently?
$ git reset --hard HEAD^

41. FAQ: Howto @#$@!%^?
Sorry, Next Time…

42. IT’s TIME TO SEE
What You Can Do
To Test The Limit And Breakthrough