RH124 — Red Hat System Administration I

1Introduction to Red Hat Enterprise Linux

What Linux is · What RHEL is · How this course is organized

2Accessing the Command Line

The bash shell · Command syntax · Getting help

3Getting Help from Local Documentation

man page sections · info & pinfo · /usr/share/doc

4Registering Systems for Red Hat Support

Subscriptions · subscription-manager · Red Hat Insights

5Getting AI-Assisted Help with RHEL Lightspeed

The c command · Installing the assistant · Using it responsibly

6Navigating the File-System Hierarchy

FHS layout · Absolute & relative paths · Moving, copying, finding files

7Managing Files from the Command Line

Wildcards · Viewing content · Redirection · Archiving & compression

8Editing Text Files

vim modes · Basic editing · Search & replace · nano

9Redirecting Shell Input and Output

File descriptors · Combining streams · tee · Command substitution

10Managing Local Users and Groups

/etc/passwd & /etc/shadow · useradd/usermod/userdel · Groups

11Controlling Access to Files

rwx permissions · chmod & chown · umask · Special bits · ACLs

12Installing and Updating Software with RPM

RPM package format · dnf · Querying & verifying · Package history

13Installing and Updating Applications with Flatpak

Sandboxed apps · Remotes · flatpak CLI · GNOME Software

14Accessing Removable Media

Mounting & unmounting · lsblk & blkid · Automount · Safe removal

15Monitoring and Managing Linux Processes

ps & top · Job control · Signals & kill · Priority & nice

16Controlling Services and Daemons

systemd units · systemctl · Enabling at boot · Dependencies

17Introduction to Networking

IPv4 basics · NetworkManager · nmcli & nmtui · Name resolution

18Managing Network Configuration

Connection profiles · Static routes · DNS details · Troubleshooting

19Configuring and Securing SSH

Protect SSH communication · Host keys · Key-based authentication