For more info, you may visit below link:

• https://www.atlassian.com/git/tutorials/syncing/git-pull

Things you need to do to add files on github if you alredy have existing files in it

• You clone {link}
• go into the folder
• git status
• you may add username and email with below commands
• git config --global user.name "robin"
• git config --global user.email "[email protected]"
• you can make change in files if you want
• git commit -a -m "message" or follow below step
• you may do git add {file.txt} or git add . ->to add anything and then commit with message
• git log
• you will see the commit id
• git reset {commit id} to return back to previous changes
• git pull -> You want to pull from github when somebody makes changes on github(remote) and you want to have that change reflect on your local
• Note: git pull {remote} -> is same as git fetch {remote} followed by git merge origin/{current branch}
• git remote (will show origin)
• git push origin master (where origin -> remote and branch -> master)

Things you need to do want to create a new folder and make a complete start using new repo

• git init (do ls -lart) (you will see .git hidden directory)
• git remote (you will not see anything since you are starting a complete new setup from local)
• git remote -v (you may not see anything)
• don't initialize with redme
• git remote add origin {link}
• git remote or git remote -v to see
• git push origin master

To work on different branches

• git branch
• git branch development
• git checkout development
• make changes
• git push master
• git checkout master
• git merge development

Resolving confict

• you neet to resolve git conflict if two developers made changes in the same line of code.
• On github, you need to delete lines like >>>>>> and =======
• Do commit merge.
• Merge merge pull request and confirm merge

Create a repo mysource, add some files, clone it locally and then push it to new repo called mytarget

• Create a new repo at github (do not add any readme file or initialize git).
• Create second repo
• Clone 1st repo (under 1st repo folder, create some files) git clone in local (copy source path and clone)
• Git remote -v (will take origin by default)
• git remote add target(secondrepo) (copy target path)
• git remote -v
• git push target master

Create a repo on github, create development branch, add some changes to development branch and then merge it with master

• create branch called development
• make some changes in files
• Create base: master and compare with: development
• create a pull request
• pull request merged by master

Create a repo, changes the default branch from master to development

• git branch development
• on settings, go to branches change the default branch and make update.

You can have Branch protection rule

Reset must be done within the same branch

• git log
• copy the commit id of unchanged version
• git (commit id) --hard (throws back to earlier place)

Working with branches

• git branch development -- will create a development branch
• git checkout development -- you can now make some changes in development branch
• git add .
• git commit -m "made changes"
• git push -u origin master -- will push changes made in development to master
• git merge development -- will merge changes in development

.gitignore

• you can keep files inside .gitignore and if you do git status, you will see only .gitignore
• lets say you make abc.log, bcd.log and .gitignore; you can vi .gitignore and .*log inside it. You can see the files by ls but you only see .gitignore in git status.

setting password as user

• cd
• sudo useradd robin
• sudo passwd robin

create a shortcut of /tmp/abc.txt in home directory

• cd /
• vi /tmp/abc.txt
• cd
• ln -s /tmp/abc.txt shortcutabc.txt

giving permission to file name

• chmod 700 {filename}
• chmod 600 {filename}
• chmod 755 {filename} and so on

More, less, head, tail

• more >> enter (more%) , b (less%)
• less >> space (down) b (up)
• head >> top 10 content within a file
• tail >> buttom 10 content within a file