July 2018 - Kyle Kowalczyk

Linux – Harden SSH

July 16, 2018 kyle@smallguysit.com 0

SSH is one of the most widely used administration methods for Linux servers and it is because of that you will find seemingly endless amounts of devices accessible on the Internet that are listening on […]

Java 10 – Compile First Java Program

July 7, 2018 kyle@smallguysit.com 0

In this article I will demonstrate how to compile your first Java program from the command line. Our first program will not be anything fancy, it will be the defacto standard first program everyone has […]

Cisco

Cisco IOS – View CPU and Memory Usage

Recently I was tracking down some performance issues on some of my switches and found myself checking the CPU and memory utilization quite often so I figured I would make this post, I show how [...]
Linux

Generate OpenSSH Public/Private Key Pair

In this post I will be demonstrating how to generate an RSA private and public key pair for SSH authentication to a Linux server. Using key based authentication enhances security when accessing devices directly over [...]
Cisco

Cisco IOS – Schedule Reboot / Cancel Reboot

When making potentially intrusive changes or doing fail over testing and you do not have physical access to the device, it is a good practice to save the working config, schedule a reboot and make [...]
Uncategorized

For, Until, While Loops and If statements – Bash scripting

In this video tutorial I demonstrate syntax and behavior of running for, until, and while loops in addition to if statements in bash. This is geared toward the beginner who is learning loops and flow [...]
Cisco

Cisco 3750x – Update Firmware from TFTP

The last way I want to upgrade firmware is through the Serial port, even changing the baud rate to the highest possible takes forever to transfer an image, what I like to do is either hook my laptop [...]

Kyle Kowalczyk

Technical Blog

Month: July 2018

Linux – Harden SSH

Java 10 – Compile First Java Program

Cisco IOS – View CPU and Memory Usage

Generate OpenSSH Public/Private Key Pair

Cisco IOS – Schedule Reboot / Cancel Reboot

For, Until, While Loops and If statements – Bash scripting

Cisco 3750x – Update Firmware from TFTP