Words Have Meanings

As a follow-up to my post with Suggestions for Trump Supporters [1] I notice that many people seem to have private definitions of words that they like to use. There are some situations where the use of a word is contentious and different groups of people have different meanings. One example that is known to […]

Politics

Thinkpad X1 Carbon Gen 6

In February I reviewed a Thinkpad X1 Carbon Gen 1 [1] that I bought on Ebay. I have just been supplied the 6th Generation of the Thinkpad X1 Carbon for work, which would have cost about $1500 more than I want to pay for my own gear. ;) The first thing to note is that […]

Review

Fail2ban

I’ve recently setup fail2ban [1] on a bunch of my servers. It’s purpose is to ban IP addresses associated with password guessing – or whatever other criteria for badness you configure. It supports Linux, OpenBSD [2] and probably most Unix type OSs too. I run Debian so I’ve been using the Debian packages of fail2ban. […]

Uncategorized

Google and Certbot (Letsencrypt)

Like most people I use Certbot AKA Letsencrypt to create SSL certificates for my sites. It’s a great service, very easy to use and it generally works well. Recently the server running www.coker.com.au among other domains couldn’t get a certbot certificate renewed, here’s the error message: Failed authorization procedure. mail.gw90.de (http-01): urn:acme:error:unauthorized :: The client […]

Networking

Suggestions for Trump Supporters

I’ve had some discussions with Trump supporters recently. Here are some suggestions for anyone who wants to have an actual debate about political issues. Note that this may seem harsh to Trump supporters. But it seems harsh to me when Trump supporters use a social event to try and push their beliefs without knowing any […]

Politics

Passwords Used by Daemons

There’s a lot of advice about how to create and manage user passwords, and some of it is even good. But there doesn’t seem to be much advice about passwords for daemons, scripts, and other system processes. I’m writing this post with some rough ideas about the topic, please let me know if you have […]

Security

Cooperative Learning

This post is about my latest idea for learning about computers. I posted it to my local LUG mailing list and received no responses. But I still think it’s a great idea and that I just need to find the right way to launch it. I think it would be good to try cooperative learning […]

School

BTRFS and SE Linux

I’ve had problems with systems running SE Linux on BTRFS losing the XATTRs used for storing the SE Linux file labels after a power outage. Here is the link to the patch that fixes this [1]. Thanks to Hans van Kranenburg and Holger Hoffst√§tte for the information about this patch which was already included in […]

Security

Racism in the Office

Today I was at an office party and the conversation turned to race, specifically the incidence of unarmed Afro-American men and boys who are shot by police. Apparently the idea that white people (even in other countries) might treat non-white people badly offends some people, so we had a man try to explain that Afro-Americans […]

Society

WordPress Multisite on Debian

WordPress (a common CMS for blogs) is designed to be copied to a directory that Apache can serve and run by a user with no particular privileges while managing installation of it’s own updates and plugins. Debian is designed around the idea of the package management system controlling everything on behalf of a sysadmin. When […]

Linux