Basic Linux Workflow

Objective

Learn commands for basic Linux operations from terminal by following a penguin in Outer Space.

Introduction

Meet Pulsar Penguin, the brave astronaut quietly floating in his spaceship in outer space. As he taps with his fins on the control panel keyboard, his spacecraft is suddenly damaged by a small meteor. Trained to stay calm in such situations, he begins to navigate through the dire scenario.

Prerequisites

To follow along, you'll need:

Access to a Linux-based system or terminal emulator.

Pulsar's Directories

engine
├───mounted
│   ├───propeller.broken.part
│   └───jet.part
└───spare
    ├───jet.new.part
    └───propeller.new.part

Linux Commands in Action

Navigating and Managing Files

Calmly, Pulsar begins repair operations by determining his current location with the 'print working directory' command:
```
pwd
```
Discovering he's in the /engine directory, he confirms its contents with the 'list' command:
```
ls
```
Hearing strange noises from the 'mounted' directory, he investigates further using the 'change directory' command:
```
cd mounted
```
He finds a broken file, 'propeller.broken.part', and swiftly creates a new directory using 'make directory' to store parts temporarily:
```
mkdir temporary
```
Returning to the 'engine' level:
```
cd ..
```

He easily makes a 'copy' of the spare part:

cp spare/propeller.new.part mounted/propeller.new.part

Revisiting the 'mounted' components, he renames the new part while 'moving' it:
```
mv propeller.new.part propeller.part
```
After completing the repairs, he cleans up the debris by 'removing' unnecessary files:
```
rm propeller.broken.part
rm -r temporary
```

System Management

Facing a moment of panic when the new part doesn't work due to incorrect permissions, Pulsar temporarily grants full access using the 'change mode' command:
```
chmod -R 777 /engine/mounted
```
Encountering an error, he elevates his privileges using the 'super user do' command:
```
sudo chmod -R 777 /engine/mounted
```

Communication and Troubleshooting

With the spaceship stabilized, Pulsar performs a final check to ensure all parts are accounted for using 'global regular expression print':
```
grep part
```
Before resuming his journey, he consults the manual one last time:
```
man pwd
```

Linux Survival Summary:

pwd: Get the path to the current working directory.
ls: List directory contents. ls -lah for more information.
cd <directory_name>: Change directory. cd .. to go back to a higher level.
mkdir <directory_name>: Create a new directory.
cp <path_original_file> <path_destination_file>: Copy a file.
mv <path_original_file> <path_destination_file>: Move a file.
rm <file_path>: Remove a file. rm -rf <directory_path>: Remove a directory and everything inside it forcefully.
chmod <permissions> <file_name>: Manage permissions.
sudo <command>: Execute a command as a superuser (root).
grep <pattern> <file_name>: Search for a pattern in files.

Conclusion

Pulsar's journey demonstrates how mastering basic Linux commands can be crucial in critical situations. By familiarizing yourself with these commands, you too can navigate through the complexities of Linux systems with confidence and resilience.