Linux Administration for Beginners - Learn Basics of UNIX

Download the Windows hosts package, install Oracle VM VirtualBox on Windows using the defaults, and finish the setup. Open VirtualBox from desktop or start menu to launch the virtual machine.

Install VirtualBox on macOS by downloading from virtualbox.org, installing with your password, and launching via Spotlight to verify the Mac virtualization setup.

Learn how to customize Putty for Unix server access by setting a white background and black font, saving the server IP as a reusable session, and verifying uptime.

Learn the unix filesystem structure, from the root directory to key folders like /home, /etc, /boot, /usr, and /opt, and how binaries, configs, devices, and logs reside there.

Learn to create and edit Linux files with the vi editor, enter insert mode, escape to exit, save with :wq, quit with :q!, and view content with cat or more.

Explore UNIX file permissions by owner, group, and all users, and master read, write, and execute permissions, including how to adjust them with chmod.

Learn to create, modify, and delete groups in Linux by adding a baseball group, moving a user with usermod, verifying with getent group and id, and deleting the group.

Learn to search, install, upgrade, update, and remove packages using the yum command, manage repositories, and verify installations on Linux systems.

Assign multiple IP addresses to a single network adapter by creating virtual IPs, editing interface configuration, and verifying connectivity with ping and remote login.

Learn how to customize the server's message of the day by editing /etc/motd with vi, saving changes, and verifying the updated motd appears on new sessions.