Using the EXISTS operator and correlated subqueries

Common Types of Network Attacks

OSPF Designated Routers

OSPF Communication Packets

First steps to secure your Ubuntu Server

Installing Apache2 mods in Ubuntu Server

Installing MariaDB on an Ubuntu Server

Installing and configuring a Samba server

Configuring Ubuntu Server as a DHCP server

Configure Ubuntu Server as a DNS server

Setting a Netplan in Ubuntu Server 22.04

Using an OpenSSH config file

Setting an Ubuntu Server hostname

Connecting to an OpenSSH server

Authenticating to an OpenSSH server using keys instead of passwords

Creating an LVM volume on Ubuntu Server

Auto-mounting a volume on Ubuntu Server

Tracking disk space usage in Ubuntu Server

Scheduling tasks on an Ubuntu Server

Viewing and managing processes on Ubuntu Server

Intro to BASH scripting

Using variables in BASH

Using aliases in BASH

Editing text files with VIM and Nano

Viewing log files in Ubuntu Server