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 –...
Author: bjdean
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...
Generating pi (π) using random numbers
I was entertained by Numberphile’s dice-based generation of an approximate of pi so thought I’d throw together a quick script to try this out: random_vals_pi The...
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...
Cache::FileCache Thoughts
If using perl Cache::FileCache, some comments offering a helpful starting point to get a cache that works in a relatively well behaved and unsurprising way:...
/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...
Perl Gotcha : xor precedence
Perl has a logical xor operator but it happens to be at the very bottom of the precedence priority list , importantly below the humble...
Avoiding Custom Internet Explorer Error Pages
A bit more of a short and to the point comment rather than an actual article. Various web browsers used to display a “helpful” page...
Docker FROM debian:latest
So in my last article I created a Docker container with nothing but a statically compiled helloworld in it. That demonstrated how it’s possible to...