Category: Servers

Check Free Memory/RAM In Linux

In this quick post I will show you how to check your available or free memory/RAM, as-well as how to see what processes are taking up what percentage (top/htop). There are multiple ways to accomplish this so if I miss any please feel free to comment below so I can add them for any future visitors.

Install And Use Rootkit Hunter On Linux Server

In this post I will show you how to install and run Rootkit Hunter on your Linux based servers. Rootkit Hunter does what it’s name suggests, hunts for potential rootkits on your server. If you are infected you can try to clean it but you really may want to nuke the server and start from scratch or revert to a …

Install And Enable SAR (SYSSTAT) On Linux Servers

In this guide I will be showing you how to install and enable the SAR utility/command on Linux servers. The SAR command can be used to look at performance history, and is really useful for identifying when CPU spikes occurred and more. And example of one of the outputs that SAR is capable of delivering is below.

Remove OS Information From Postfix Banner

In this post I will be showing you how to remove your server’s OS information from the postfix banner. While this isn’t enough to stop somebody from finding out your server OS by itself, it never hurts to make things just a tiny bit more difficult.

Install Clam-AV And Setup Daily Automated Scans

In this post I will be showing you how to setup Clam-AV on an Ubuntu server as-well as how to run automated daily scans with email alerting. This may sound like it’s complicated but its really not, you can have everything setup within 5 minutes so no need to fear!

Disable/Fix SSH Timeouts On Ubuntu Server

If you get even remotely as annoyed as I do when you recieve an SSH timeout or disconnect then this post is for you. Below is how to quickly and easily fix the SSH timeout issue on the server side. This solution will not disable the timeouts entirely though, instead it just sets the threshold extremely high. While you can …

Generate Free SSL Certificate For Apache

In this quick and simple post I will show you how to generate a free SSL certificate for Apache using letsencrypt and certbot, this will allow your users to view your website or blog over a secure and encrypted HTTPS connection instead of a standard insecure HTTP connection. For the purpose of this guide I will assume you are using …