Wildcard SSL Certificates with Let’s Encrypt

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This tutorial shows you how to create a wildcard SSL certificate using Let’s Encrypt. Let’s Encrypt launched wildcard certificates in March 2018, so the process is relatively new.

Command Line, HTTPS, Let's Encrypt, Linux, Security, Server, SSL

New Vulnerability Found in Bash and How to Test

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A critical vulnerability has been found in Bash, which affects almost all Linux/Unix distributions that use or have it installed. Luckily, there is a easy way to test to see if your version is vulnerable using a command line.

Bash, Facebook, Linux, Mac OS, Security, Server

Are You Vulnerable to the Heartbleed Bug?

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A fix for the heartbleed bug, affecting OpenSSL, was released on April 7, 2014. But websites will still be vulnerable until the servers have been patched. See if your site or a site you use is vulnerable.

Security, Server, SSL

Android Apps For Developers On The Go

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If you are a developer on the go, there are a number of Android apps that can help you manage your server or fix quick issues on the go using your mobile phone or tablet.

Android, Command Line, Mobile App, Server, Sysadmin

Zero Downtime: Transferring Accounts from One cPanel Server to Another

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cPanel makes is really easy to transfer accounts / websites between servers running similar versions of cPanel / WHM, as I found out earlier this year. The process makes it possible to have zero downtime when moving / upgrading servers.

cPanel / WHM, Server, Sysadmin

Creating SSH Shortcuts

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I often have to SSH into different servers, either to deploy new code or to carry out maintenance, so SSH shortcuts are an easy way of making the login process easier.

Linux, Mac OS, Server, SSH, Sysadmin, Tutorial

Batch Resize Images on Linux Using Mogrify (ImageMagick)

4

The Linux mogrify command (part of ImageMagick) is a handy way to compress / resize a image, or multiple images easily using the CLI. mogrify can also be used for convert or compress images.

CLI, Command Line, Linux, Server

Syncing Servers using Rsync

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A while ago I had to sync files from one server to another. The reason? I was responsible for moving all the application and websites hosted on a old server to a new, faster server with better security and a updated operating system.

Linux, Server

Useful Linux Commands

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Managing a server using SSH and Command Line Access over the past few years has taught me a lot. It’s sometimes important to check how a server is doing in terms of load or you may simply want to check hard disk usage.

Linux, Server, Sysadmin