Day 12: Linux and Git Commands for DevOps Engineers

Now that we have completed the Linux & Git-GitHub hands-on in the last 11 days, let's make a cheat sheet of all the commands we have used so far.

Linux Commands -

1. Navigating the File System:

   • pwd: Print the current working directory.

   • ls: List files and directories.

   • cd: Change the current directory.

   • mkdir: Create a new directory.

   • rm: Remove files or directories.

   • cp: Copy files or directories.

   • mv: Move or rename files or directories.

2. Viewing and Editing Files:

   • cat: Display the contents of a file.

   • less: View file contents interactively.

   • nano or vim: Text editors for editing files.

   • head: Display the beginning of a file.

   • tail: Display the end of a file.

3. File Permissions:

   • chmod: Change file permissions.

   • chown: Change file ownership.

4. Processes and System Management:

   • ps: Display information about processes.

   • top or htop: Monitor system processes interactively.

   • kill: Terminate processes.

   • shutdown or reboot: Shutdown or restart the system.

5. Networking:

   • ifconfig or ip: Display or configure network interfaces.

   • ping: Send ICMP echo requests to a host.

   • ssh: Securely access remote systems over SSH.

   • netstat or ss: Display network statistics.

6. Package Management:

   • apt (Debian/Ubuntu) or yum (Red Hat/Fedora): Package management tools for installing, updating, and removing software packages.

   • dpkg (Debian/Ubuntu) or rpm (Red Hat/Fedora): Direct package management tools.

7. File Compression and Archiving:

   • tar: Create, extract, and manipulate archive files.

   • gzip or gunzip: Compress or decompress files.

   • zip or unzip: Compress or extract files in ZIP format.

8. User Management:

   • useradd: Add a new user.

   • passwd: Change user password.

   • usermod: Modify user properties.

   • userdel: Delete a user.

9. Disk and Storage Management:

   • df: Display disk space usage.

   • du: Display file and directory space usage.

   • mount and umount: Mount and unmount filesystems.

Git-GitHub commands -

1. Setting up Git:

   • git config --global user.name "Your Name"

   • git config --global user.email "your@email.com"

2. Creating Repositories:

   • git init: Initialize a new Git repository in the current directory.

   • git clone <repository_url>: Clone a remote repository to your local machine.

3. Managing Changes:

   • git add <file>: Add a file to the staging area.

   • git commit -m "Commit message": Commit staged changes with a message.

   • git diff: Show the changes between working directory and staging area.

   • git diff --staged: Show the changes between staging area and last commit.

4. Branching and Merging:

   • git branch: List all branches in the repository.

   • git branch <branch_name>: Create a new branch.

   • git checkout <branch_name>: Switch to a different branch.

   • git merge <branch_name>: Merge changes from one branch into another.

5. Updating and Publishing:

   • git pull: Fetch and merge changes from a remote repository.

   • git push origin <branch_name>: Push local changes to a remote repository.

6. Viewing History:

   • git log: Display commit history.

   • git log --oneline: Display a single commit history.

7. Stashing Changes:

   • git stash: Temporarily save changes that are not ready to be committed.

   • git stash apply: Apply the most recent stash.

GitHub Commands:

1. Managing Remote Repositories:

   • git remote -v: List remote repositories.

   • git remote add origin <repository_url>: Add a remote repository named "origin".

   • git push -u origin <branch_name>: Push and set the upstream branch.

   • git cherry-pick commit_id : To select specific commits from one branch and apply them to another branch.

Thank you for taking the time to read this blog.