Okay, I’ve been having strange problems where procmail will suddenly stop moving messages to a mailbox.
It works fine for a while, then (with no changes to the recipes) it’ll suddenly stop moving incoming spam to my spam box.
Looking at the procmail log shows it’s failing to write to the mbox file:
Continue reading procmail fails to write to large mailbox
I’ve started seeing a trend in spam over the last few months increasingly using samples of Linux/Open Source software documentation for the subject line / random text to confuse Bayesian filters. Mostly it doesn’t help them get past SpamAssassin, but they’re trying to be clever and increase their chances. It does seem kind of futile though – technical users generally aren’t stupid enough to respond to spam.
Continue reading Spammers targetting “techies”?
I’ve been using wifi on my Dell Inspiron 1150 laptop courtesy of a D-Link AirPlus DWL-G650+ Wireless Cardbus Adaptor. It’s been a great little card, but there’s no decent native Linux drivers supporting WPA encryption (or, at least, there weren’t when I first installed it). Now I’ve finally decided to move on, and purchased an Intel 2200BG mini-PCI wireless adaptor.
Continue reading Installing Intel IPW2200BG under Linux
Bash allows for programmable completion, to extend the “hit tab to complete what I started typing for me” functionality. (Programmable completion was added to Bash in 2.04 beta, so if you have a Bash older than that, it won’t work – use bash –version to find out). Here’s a quick guide to setting up bash-completion to make Bash even nicer to use. Continue reading Bash auto-completion
Ever wanted to check the result of a DNS lookup from various DNS servers, perhaps to see how far a recent DNS change has propagated – which servers are giving the new answer, and which still have the old answer cached?
I recently wrote a little Perl script to do just that. My DNS Propagation Checker will query a set of 10 servers at random and show you the results. (Be warned, it may be a little slow at times, because (a) it has to wait for the DNS servers (I might re-write it one day to do the requests concurrently) and (b) my poor little virtual server is a little slow and overloaded right now.
Continue reading DNS Propagation Checker
GNU Screen is a little-used but very powerful utility, allowing you to do more from a Linux console, whether from a “real” console or logged in to another machine via SSH.
It is “a full-screen window manager that multiplexes a physical terminal between several processes (typically interactive shells)“.
This is a simple guide to getting started with GNU Screen.
Continue reading GNU Screen – a primer