Allow IPs to Bypass Apache’s Authentication
A common need when using Apache’s user authentication is to have a whitelist of IPs that can bypass it. This is a pretty straight-forward process but it can appear unintuitive as first.
Caching Proxies – the Cheap Way to Handle Lots of Traffic
Over the course of my sysadmin career I’ve managed server setups designed to handle very large volumes of traffic, including one site that needs to periodically handle over 10000 concurrent users. In order to meet these demands they were designed with complex hosting – load-balancers, auto-scaling cloud infrastructure and things …
Fix Slow SSH Logins
Often, when trying to ssh into Linux boxes, it can take over 30 seconds to log in or even see the login …
Generate SSH Keys
Generating SSH keys is fairly standard Linux task to do. SSH keys allow a more secure method of logging into a remote …
Find Out Process Memory Usage
Figuring out how much memory a process is using can be tricky due to the way Linux does memory management. However, here …
3 Simple Server Changes to Boost Website Performance
Site speed matters. Google is now using page load times as a minor ranking factor, plus research done by Akamai and Gomez.com …
PHP – Generate Random Strings
Generating random strings in PHP is, in my opinion, not as nice as in Bash or Python, however here is how to …
Postfix – Pipe Emails to a Script
Piping an email to a script is a rather handy feature. It’s popular with service desk software as well as notification systems. …
Setup Virtual Domains in Postfix (Without a Database)
By default, Linux servers will only deliver to system users. However this is obviously not useful for mail servers which need to …
Python – Generate Random Password Strings
Below is a few lines of Python code for when you need to generate random strings for things like passwords, hashes or …