Lesson 3: Installing and Configuring Linux Operating Systems

Installing a Linux server (e.g. Ubuntu or CentOS) starts with booting from a Linux live USB or DVD. You often need to choose a "Server" installation mode. Steps include selecting language, keyboard layout, and creating disk partitions (ext4 is common for Linux). You then create a root (administrator) password and possibly a regular user account. Many Linux installers ask whether to install a bootloader (GRUB) – you usually say yes so the system can boot.

After Linux is installed, initial setup is usually done via the command line. You might configure the hostname with hostnamectl and network with nano /etc/network/interfaces or nmcli. On many distros, you update package lists (sudo apt update) and install essential tools (sudo apt install net-tools, etc.). Setting up an SSH server (sudo apt install openssh-server) is common so you can log in remotely. You can also use GUI tools if installed (like Ubuntu's "Software & Updates").