CheatSheet :)

Linux:-

1. File and Directory Operations:

   • ls: List files and directories in the current directory.

   • pwd: Print the working directory.

   • cd: Change the current directory.

   • touch <filename>: Create an empty file.

   • mkdir <dirname>: Create a new directory.

   • rm <file or dir>: Remove a file or directory (use with caution).

   • mv <source> <destination>: Move or rename files and directories.

   • cp <source> <destination>: Copy files and directories.

2. File Viewing and Editing:

   • cat <file>: Display the content of a file.

   • more <file> or less <file>: View a file one screen at a time.

   • nano <file> or vim <file>: Open a text editor to create or edit files.

3. File Permissions:

   • chmod <permissions> <file>: Change file permissions.

   • chown <user>:<group> <file>: Change file ownership.

4. Searching and Finding:

   • grep <pattern> <file>: Search for text in files.

   • find <directory> -name <filename>: Find files and directories.

5. Process Management:

   • ps: List running processes.

   • top or htop: Monitor system activity and processes.

   • kill <PID>: Terminate a process by its Process ID.

6. Package Management:

   • apt-get or apt (Debian/Ubuntu): Package management commands for installing, updating, and removing software.

   • yum (Red Hat/CentOS): Package management commands.

7. Networking:

   • ifconfig or ip a: Display network interface information.

   • ping <hostname or IP>: Check network connectivity.

   • netstat: Network statistics.

   • ssh <user>@<host>: Securely connect to a remote server.

8. Archiving and Compression:

   • tar: Archive files and directories.

   • gzip, gunzip, zip, unzip: Compress and decompress files.

9. System Information:

   • uname -a: Display system information.

   • df: Show disk space usage.

   • free: Display available memory.

10. User and Group Management:

    • useradd, userdel, usermod: Manage user accounts.

    • groupadd, groupdel, groupmod: Manage user groups.

11. File Transfer:

    • scp: Securely copy files between hosts.

    • rsync: Synchronize files and directories.

12. System Control:

    • reboot: Reboot the system.

    • shutdown: Shut down the system.

Git-Github

Git Commands:

1. Initializing a Git Repository:

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

2. Cloning a Repository:

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

3. Working with Changes:

   • git status: View the status of your working directory.

   • git add <file>: Stage changes for commit.

   • git reset <file>: Unstage changes.

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

4. Committing Changes:

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

   • git commit -a -m "Your commit message": Stage and commit all changes in one command.

5. Branching:

   • git branch: List all local branches.

   • 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 the current branch.

6. Stashing Changes:

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

7. Viewing History:

   • git log: View commit history.

   • git log --oneline: View a simplified commit history.

8. Working with Remotes:

   • git remote -v: List remote repositories.

   • git remote add <name> <URL>: Add a new remote repository.

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

   • git pull <remote> <branch>: Pull changes from a remote repository.

GitHub Commands:

1. GitHub Workflow:

   • git pull origin main: Pull changes from the main branch on GitHub.

   • git push origin main: Push changes to the main branch on GitHub.

2. Collaboration:

   • Fork a repository on GitHub: Create your own copy of a repository to work on.

   • Create a Pull Request (PR): Propose changes to the original repository.

   • Review and merge PRs: Collaborate with others to merge changes into the original repository.

3. GitHub Issues:

   • Create issues: Track and discuss tasks or problems.

   • Mentioning issues: Reference issues in commits or comments using #.

4. GitHub Actions:

   • Automate workflows using GitHub Actions for continuous integration and more.

Day 12 of #90daysofDevOps

Thanks for reading

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