Linux & Git-GitHub Cheat-sheet

Linux Command Shell Scripting Cheatsheet:

1. Basic commands:

• ls: lists files and directories

• cd: changes directory

• pwd: prints the working directory

• mkdir: creates a new directory

• rm: removes files or directories

• cp: copies files or directories

• mv: moves files or directories

• cat: displays file contents

• grep: searches for a pattern in a file or output

• echo: prints a message to the terminal

• chmod: changes file permissions

• sudo: executes a command as the superuser

1. Variables:

• To define a variable: variable_name=value

• To access a variable: $variable_name

• To use arithmetic operations: $(($variable_name + 1))

1. Control structures:

• if statement:

if [ condition ]; then
  command1
else
  command2
fi

• for loop:

for variable in list; do
  command
done

• while loop:

while [ condition ]; do
  command
done

1. Functions:

• To define a function:

function_name() {
  command1
  command2
}

• To call a function: function_name

1. Input/output:

• read command: reads input from the user

read variable_name

• echo command: prints output to the terminal

echo "message"

Git and GitHub Cheatsheet:

1. Basic commands:

• git init: initializes a new Git repository

• git clone: clones a remote Git repository

• git add: adds changes to the staging area

• git commit: commits changes to the repository

• git push: pushes changes to a remote repository

• git pull: pulls changes from a remote repository

• git status: displays the status of the repository

• git log: displays the commit history

1. Branching:

• git branch: lists all branches

• git branch branch_name: creates a new branch

• git checkout branch_name: switches to a different branch

• git merge branch_name: merges a branch into the current branch

1. Collaboration:

• git remote: lists all remote repositories

• git remote add remote_name remote_url: adds a new remote repository

• git fetch: fetches changes from a remote repository

• git merge origin/branch_name: merges changes from a remote branch into the current branch

• git pull --rebase: pulls changes from a remote repository and rebases local changes on top

1. GitHub:

• git push -u origin branch_name: pushes a new branch to a remote repository

• git pull-request: creates a new pull request

• git remote add upstream upstream_url: adds the original repository as a remote upstream

• git fetch upstream: fetches changes from the original repository

• git merge upstream/master: merges changes from the original repository into the current branch

Note: It's important to ensure that your changes are well tested before pushing to the remote repository, and to always fetch and merge changes before pushing your own changes to prevent conflicts.