Introduction to Shell Commands

The command-line interface (CLI) is a powerful tool for interacting with your computer's operating system. Whether you're a beginner or an experienced user, mastering essential shell commands can significantly enhance your productivity and efficiency. In this guide, we'll explore a comprehensive list of essential shell commands that every user should know.

0. System Information

uname: Print system information
```
uname -a   # All information
```
df: Display disk space usage
```
df -h   # Human-readable format
```
top: Display Linux processes
```
top
htop
```
sudo command: to run any command as super user
```
sudo command
```

cd: Change directory
```
cd directory_name
```
pwd: Print current working directory
```
pwd
```

ls: List directory contents

ls
ls -l   # Detailed list
ls -a   # Show hidden files

mkdir: Make Directory
```
mkdir new_directory
```
rmdir: Remove Directory
```
rmdir directory_to_remove
```

2. Managing files

touch: Create Empty File
```
touch new_file.txt
```
cp: Copy Files and Directories
```
cp file1.txt file2.txt
```

mv: Move/Rename Files and Directories

mv file1.txt new_directory/file1.txt
mv old_name.txt new_name.txt

rm: Remove Files and Directories
```
rm unwanted_file.txt
```

3. Viewing and Editing Files

cat: Display File Content
```
cat file.txt
```
more: Paginate Through File Content
```
more file.txt
```
less: View File Content with Navigation
```
less file.txt
```
nano/vi: Simple Text Editor
```
nano file.txt
vi file.txt
```

4. Process Management

ps: List Running Processes
```
ps
```
kill: Terminate a Process
```
kill process_id
```

5. Networking

ping: test the reachability of a host on Internet
```
ping hostname
ping https://www.google.com
```
ifconfig/ip: Display network configuration
```
ifconfig
ip addr show
```
ssh: Securely connect to a remote server
```
ssh username@hostname
```

Coded by Deepam