Ubuntu 20
Ubuntu 20.04 LTS (Focal Fossa) is a popular long-term support (LTS) release of Ubuntu, known for its stability, security, and 5-year support cycle (until April 2025, with extended security maintenance available). Here's an overview of key features, installation tips, and common usage scenarios:Key Features of Ubuntu 20.04 LTS
[*]Desktop Environment:
[*]Default: GNOME 3.36 (clean, modern UI with improved performance).
[*]Alternatives: KDE Plasma, XFCE, MATE (via official flavors like Kubuntu, Xubuntu, etc.).
[*]Software & Tools:
[*]Pre-installed apps: Firefox, LibreOffice, Thunderbird.
[*]Package management: apt (command-line) + Snap (universal package format for easy installs).
[*]Default shell: Bash (with Zsh available via sudo apt install zsh).
[*]Performance & Security:
[*]Faster boot times and reduced memory usage.
[*]Enhanced security with AppArmor, firewall (UFW), and regular security updates.
[*]Developer-Friendly:
[*]Pre-installed Python 3.8, GCC, and build tools.
[*]Support for containers (Docker, LXD) and Kubernetes.
[*]Compatibility with WSL 2 (Windows Subsystem for Linux) for Windows users.
Installation Tips
[*]Download:
[*]Get the ISO from Ubuntu Releases.
[*]Verify the checksum (SHA256) to ensure integrity.
[*]Create Bootable Media:
[*]Use Rufus (Windows) or dd (Linux/macOS) to write the ISO to a USB drive.
[*]Installation:
[*]Boot from USB, select "Install Ubuntu."
[*]Choose between:
[*]Erase disk and install Ubuntu (full system replacement).
[*]Something else (manual partitioning for dual-boot or custom setups).
[*]Enable encryption (LUKS) during installation for security.
[*]Post-Installation:
[*]Update packages:
sudo apt update && sudo apt upgrade -y
[*]Install essential tools:
sudo apt install build-essential curl git
Common Use Cases
[*]Desktop User:
[*]Ideal for daily tasks, coding, and media consumption.
[*]Customize with extensions (e.g., Dash to Dock, User Themes).
[*]Server/Cloud:
[*]Deploy as a VM (AWS, Azure, GCP) or on-premises server.
[*]Use netplan for network configuration.
[*]Development:
[*]Set up a LAMP/LEMP stack:
sudo apt install apache2 mysql-server php libapache2-mod-php
[*]Use Docker:
sudo apt install docker.io
[*]Remote Work:
[*]Enable SSH:
sudo apt install openssh-server
[*]Configure firewall:
sudo ufw allow 22/tcp# Allow SSH
sudo ufw enable
Troubleshooting
[*]Driver Issues: Use Additional Drivers (GUI) or ubuntu-drivers CLI tool for NVIDIA/AMD GPUs.
[*]Wi-Fi Problems: Check rfkill list or install firmware packages (e.g., firmware-iwlwifi).
[*]Snap Permissions: Use snap connections to manage permissions.
Upgrading from Older Versions
[*]From Ubuntu 18.04/19.10:
sudo do-release-upgrade
[*]Backup data before upgrading.
Alternatives
[*]Lightweight: Lubuntu (LXQt) or Xubuntu (XFCE) for older hardware.
[*]Enterprise: Ubuntu Pro (extended security maintenance, compliance tools).
Ubuntu 20.04 remains a solid choice for stability-focused users. For newer features, consider Ubuntu 22.04 LTS (Jammy Jellyfish).
页:
[1]