# List files and directories in the current location
ls

# Change directory
cd /path/to/dir

# Display the content of a file
cat file.txt

# Print text to the terminal
echo "Hello World"

# Remove a file or folder (-r for directories)
rm file.txt
rm -r folder_name

# Create a new directory
mkdir new_folder

# Create an empty file
touch new_file.txt

# Move or rename a file/directory
mv old_name.txt new_name.txt
mv file.txt /path/to/destination/

# Copy a file or directory (-r for directories)
cp file.txt copy.txt
cp -r folder /path/to/destination/

# Search for text inside a file
grep "keyword" file.txt

# Git commands
git init        # Initialize a new repository
git status      # Show the status of files
git add .       # Add all files to staging
git commit -m "Message"   # Commit changes with a message

# Download files from the internet
wget https://example.com/file.zip

# Package management (Ubuntu/Debian)
apt update
apt upgrade
apt install package_name

# Manage services with systemctl
systemctl status service_name
systemctl start service_name
systemctl stop service_name

# Manage services (old command, alternative to systemctl)
service service_name start
service service_name stop

# Monitor processes and system resources
top     # Basic monitoring tool
htop    # Advanced monitoring tool (needs installation)

# Text editors
vi file.txt
vim file.txt
nano file.txt

# View file content page by page
less file.txt

# Show the first lines of a file
head file.txt
head -n 20 file.txt  # Show first 20 lines

# Show the last lines of a file
tail file.txt
tail -f log.txt      # Follow file updates live