Useful Commands
A list of commands / references I’ve found useful. Also see my old wiki page. stdbuf – Run COMMAND, with modified buffering operations for its...
Category: SysAdmin
Posts about system administration.
bandwidth measurement using iperf
I wrote about using netcat to measure bandwidth between servers which works perfectly well in a minimal sort of way (and in particular between servers...
Joining log lines with sed
It’s often the case when analysing system logs that you want to create a summary bringing together data from different lines of a log –...
Conference, ChromeBook, A VM and Me
I’m at a conference, I have my ChromeBook (vanilla, no local linux installs or any such thing), I have internet and I’ve set up a...
Which ssh publickey was used to access an account
When you have more than one public key set up to be able to access a single account (ie more than one public key listed...
bandwidth measurement using netcat
For plain bytes/second bandwidth testing – ie without taking things like encryption overhead and compression improvements into account – the netcat command-line utility is pretty...
/usr/bin/base64 – copying and pasting code / patches betweeen terminals
The Scenario A couple of terminals open, connected to a mix of your own workstation, local development servers and remote servers running on a different...
Getting WordPress Up and Going
Setting up WordPress server there were a couple of minor wrinkles to sort out. I’ve run a blog before before and that fell by the...
Protecting Joomla : User-Registration Spam Relay
The Problem: A Default Setting By default user registration is enabled. It’s important to realise that even though links to the user registration page may...