Linux is one of the most widely used operating systems in servers, programming, cloud, DevOps, and
system administration. This guide combines a practical table with an interactive emulator to practice
commands, reinforce concepts, and visualize simulated changes without touching a real server.
Learning note: the emulator output is simulated for practice, training, and onboarding.
On a real system it may vary by distribution, permissions, installed packages, and configuration.
Interactive Linux CLI Emulator
Type a command, use the table, or run a guided challenge. The emulator will show simulated output,
feedback and visual changes in the Linux system.
Challenge: run pwd to check the current path.
LX[]::..
linux-runbook.md0/10
Linux CLI
Run the next command to receive guided feedback.
Expected runbook commandspwd
Run the next command to receive guided feedback.
Run the next command to receive guided feedback.
Linux system visualizerEnvironment ready: no changes yet.
$ Linux emulator ready
Choose a command from the table or type one in the console.
Simulated expected output
On small screens, the table adapts into cards to avoid content cutoffs.
#
Command
Description
Example
Actions
Conclusion
These 50 Linux commands cover navigation, files, permissions, processes, networking, packages, and day-to-day operations.
Practicing them in a simulated environment lets you learn safely before working on real infrastructure.
Git: learn version control through guided practice
Git is an essential tool for software development, DevOps, SRE, automation,
technical documentation, and collaborative work. It lets you save changes, compare versions,
create branches, work with teams, and connect your local repository with platforms such as
GitHub or GitLab.
Git records a project’s change history. Each commit works as a checkpoint that helps you review
what changed, who changed it, and why. With branches, you can build new features without affecting
the main version. With remotes, you can synchronize work with servers such as GitHub, GitLab,
Bitbucket, or internal company repositories.
1. Control
Keeps history, supports returning to previous versions, and reduces the risk of losing work.
2. Collaboration
Supports branches, reviews, Pull Requests, Merge Requests, and teamwork.
3. Automation
Forms the foundation for CI/CD, deployments, technical auditing, and modern DevOps practices.
Interactive Git emulator
Practice commands in a safe learning environment. The emulator shows the terminal, result output,
visual canvas, and textual explanation of what happens at each step.
Loading Weisewelt emulator...
40 Git commands explained
Use this table as a quick guide. Each command can be copied and pasted into the emulator
to practice the Git workflow step by step.
#
Command
What it does
When to use it
Copy
1
git --version
Checks the installed Git version.
Confirm Git is installed before starting.
2
git config --global user.name "Your Name"
Sets the global Git user name.
Initial workstation setup.
3
git config --global user.email "email@domain.com"
Sets the global Git user email.
Associate commits with your identity.
4
git config --list
Shows the active Git configuration.
Review user, email, and settings.
5
git init
Creates a Git repository in the current folder.
Start local version control.
6
git clone https://github.com/user/project.git
Downloads a full copy of a remote repository.
Work on an existing project.
7
git status
Shows modified, new, or staged files.
Review state before committing.
8
git add file.txt
Adds a specific file to the staging area.
Prepare a focused change.
9
git add .
Adds all changes from the current directory.
Stage all local changes.
10
git restore file.txt
Discards unstaged changes in a file.
Revert unwanted local edits.
11
git restore --staged file.txt
Removes a file from staging without deleting edits.
Fix what was about to be committed.
12
git commit -m "Clear change message"
Records staged changes in history.
Save a logical unit of work.
13
git commit --amend -m "New message"
Updates the latest local commit.
Fix a message or include a forgotten file.
14
git log --oneline
Shows compact commit history.
Quickly review the timeline.
15
git log --graph --oneline --decorate --all
Shows history with branches and references.
Understand branches and merges visually.
16
git diff
Shows unstaged differences.
Review changes before git add.
17
git diff --staged
Shows staged differences.
Validate what will enter the commit.
18
git branch
Lists local branches.
Know which branch you are working on.
19
git branch feature/login
Creates a new branch without switching to it.
Prepare a parallel line of work.
20
git checkout -b feature/login
Creates a branch and switches to it.
Start a new feature.
21
git switch main
Switches to the main branch.
Return to the main branch.
22
git switch -c feature/api
Creates and switches to a branch using modern syntax.
Restores the latest stash and removes it from the list.
Continue paused work.
36
git tag v1.0.0
Creates a local tag.
Mark an important version.
37
git push origin v1.0.0
Publishes a tag to the remote.
Share a released version.
38
git reset --soft HEAD~1
Undoes the last commit while keeping changes staged.
Reorganize a recent commit.
39
git reset --hard HEAD~1
Deletes the last commit and its local changes.
Use only when sure; it removes changes.
40
git cherry-pick abc1234
Applies a specific commit to the current branch.
Move one targeted change between branches.
✓
Learning recommendation
Start with status, add, commit, branch,
merge, pull, and push. Then move to rebase,
stash, tag, reset, and cherry-pick.
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