How To
zypper Command Cheat Sheet for openSUSE Leap
If you came to openSUSE from Debian or Fedora, the command that catches you out is the upgrade…
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How To
How To
VLSM Subnetting Explained: How to Subnet by Host Requirements
Carving a network into equal-size subnets wastes addresses. A point-to-point link with two routers does not need the…
How To
How to Subnet: A Step-by-Step Guide to Subnetting by Network Requirements
Most people who struggle with the CCNA do not freeze on OSPF or VLANs. They freeze on a…
How To
Configure DNS on Cisco Routers
DNS turns names into addresses, so you can reach server1.lab.example.com without memorizing 10.0.0.1. A Cisco router handles names…
How To
Configure HSRP on Cisco Routers
When the default gateway on a subnet dies, every host on it loses the path off the LAN…
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Cisco IOS CLI Editing Commands and Navigation Shortcuts
Most of the time you spend on a Cisco router or switch is spent typing in the IOS…
How To
Configure SSH on Cisco Routers and Switches
Telnet sends your username and enable password across the wire in cleartext. SSH does not, and on a…
How To
Cisco Device Base Configuration: Hostname, SSH, and Secure Access
A factory-fresh Cisco router or switch trusts whoever reaches the console, answers to the generic name Router or…
How To
CCNA 200-301 Study Guide and Roadmap
The CCNA 200-301 is a single exam that certifies you can install, configure, and troubleshoot a small enterprise…
How To
What’s New in openSUSE Leap 16
openSUSE Leap 16 is the first major version bump the distribution has had in roughly seven years, and…
How To
Things to Do After Installing openSUSE Leap 16
You just finished the openSUSE Leap 16 install and you are staring at a clean GNOME desktop. Before…
How To
Upgrade openSUSE Leap 15 to Leap 16
openSUSE Leap 15.x is on the clock. The 15.6 release is the last of the 15 line, and…