Ubuntu Server Headless USB Reference

This USB contains quick reference cheat sheets for Ubuntu Server (headless) administration.
All files are Markdown and safe to read — commands are not executed automatically.

Use nano, cat, or less to read them directly from the USB.

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Included Cheat Sheets

File	Description
wifi.md	Wi-Fi scanning, connecting, disconnecting, persistent connections, and troubleshooting
Ethernet.md	Wired network interface commands, temporary & persistent configuration (Netplan), troubleshooting
usb.md	Detecting, mounting, unmounting, and monitoring USB devices
network_folder.md	Discovering, connecting, creating, and mounting network shares (Samba/CIFS)
services.md	Managing systemd services: start, stop, restart, enable, disable, logs, listing, and configuration
firewall.md	UFW firewall: view rules, allow/deny ports/IPs/protocols, hardening, logging, and troubleshooting
permissions.md	File/folder permissions: viewing, changing, numeric/symbolic modes, special permissions, searching, ACLs
system.md	System info, uptime, processes, logs, updates, and performance monitoring
files.md	File/folder management, navigation, copying, moving, deleting, and searching
packages.md	Install, remove, update packages, search repositories, and manage software
troubleshooting.md	Common server troubleshooting commands for network, disk, services, and hardware

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Usage Tips

• Open any cheat sheet in the terminal:

less wifi.md
nano wifi.md
cat wifi.md

• All commands require sudo if modifying system settings
• Default configurations are safe to inspect; only execute commands you understand
• Use lsblk, ip link, ip addr, and systemctl to check the current state before making changes

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Recommended Reading Order

1. Ethernet.md / wifi.md – network connectivity first
2. usb.md – managing storage devices
3. network_folder.md – access network shares
4. services.md – manage server services
5. firewall.md – secure your server
6. permissions.md – set correct file/folder access
7. packages.md – install necessary software
8. files.md – manage files and folders
9. system.md – monitor and check system status
10. troubleshooting.md – resolve issues

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Notes

• Replace interface names (wlan0, eth0) and IPs with your actual configuration
• Replace <service_name> with actual services like ssh, nginx, apache2
• Commands are written for Ubuntu Server (headless); some desktop tools are omitted
• Keep this USB as a reference for offline server administration

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