DevOps: Day 12

Git and GitHub
The fundamentals of git and github is version control system.
The two problems version control systems solve are
- Versioning.
- Sharing of code.
Some of the version control system we have are:
- CVS: Centralized
- SVN: Centralized
- Git: Distributed
Fork is creating an entire copy of the original source code as your own copy.
Git is a distributed version control system. And it is an open source tool.
Github (bitbucket etc.) is a solution that is built ontop of git. Used for project management, keeping of code, code review, comment etc.
To see everything under git, all the options, simply type git on The terminal and Press enter.
To initialize git, use git init this will initialize an empty git repository.
Every DevOps Engineer should understand the lifecycle of git. Which are the three basic commands of:
- git add: track file(s)
- git commit: tell git what changes you have made in those/that file.
- git push
git diff: to check for the exact changes that were/was made.
git log: to check for all the commits for a file/files.
Lets say you have a project having two versions committed, and then you're asked to return to the first version (first commit), here is what you're supposed to do:
- use git log to check for all commits
- copy the commit hash i.e the first commit hash
- git reset --hard . So technically, one can go back to any previous version of His/Her code with git.
To share code within the distributed system is where github/bitbucket/gitlab comes in.

Thank you!

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