Accessing Linux Systems Using RHEL 8

Before we can work with a system, we need to access it first. A Linux system administrator works with a number of different user accounts in the course of their regular day. Understanding how to leverage different user accounts and their associated environments is a key skill.

Since most system logins won't be at the console, the SSH utility is a key tool in any Linux system administrator's toolbox. It allows users to not only make secure connections to other hosts but also securely execute commands on remote systems, securely tunnel services and X11 sessions, transfer files, and more.

Using passwords for user authentication has been the standard for a long time. But what if you need to make connections or execute remote commands without interaction? SSH provides a mechanism for this via key-based authentication.

Red Hat Exam Requirements Covered:

• Log in and switch users in multi-user targets
• Access remote systems using SSH
• Configure key-based authentication for SSH
• Securely transfer files between systems