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Better nagios SMS and E-mail messages

Just for my references. I made changes to it before, but I now added the comments to them (for custom notifications and acknowledgements): Read More »

Teamviewer replacements

ChunkVNC consists of three parts, InstantSupport, Repeater and Viewer. Read More »

Iptables: limiting amount of connections per IP

Short version of this. To allow SSH TCP connections, but only 10 new per 60 seconds: Read More »

Dumping MySQL users and grants

MySQL stores its users and grants in a very annoying, non-clonable format. I found this post, describing how you can extra them. Read More »

Openswan random failures

I have an annoying problem with my Openswan VPN server. When I connect from a Windows XP machine, from that point on, I can only connect with that machine (or perhaps other Windows XP machines as well). On the other hand, when I connect with a Windows 7 machine first, connecting from Windows XP is no longer possible. Read More »

Turkey cooking time

As a note to self for next year: We just had a 8 kg turkey for our Thanksgiving meal. Recipes on the internet said it needed 7 to 8 hours of cooking. However, we took it out after 5.5 hours, and it was even somewhat overcooked. It probably needed about 4.5-5 hours. Read More »

Cursor definition and looping with MS SQL

In MSSQL, I needed to loop over a bunch of orders and execute a stored procedure, except in one case. This does that: Read More »

Upgrading PowerDNS from Debian Squeeze to Wheezy

As I mentioned here, I had to manually create a database schema when I installed PowerDNS on Debian Squeeze. Later versions apparently create one themselve. Read More »

Broken disk went undetected, but did corrupt data

I had a disk in one of my servers that was starting to give ATA errors in the syslog. Contrary to what you might think, ATA errors are fairly common, so I didn't immediately sound the alarm. However, this disk turned out to be corrupting data. During upgrading Debian 6 to 7, the file system became read-only. Rebooting gave me a recovery shell and e2fsck gave me millions of questions. Read More »

Readline shortcuts: Ctrl-s and XOFF

And another contribution to my list of Readline keyboard shortcuts. This time it's a note by Joo Matos, pointing me to problems with the Ctrl-s shortcut. (It acts as a flow control character that pauses transmission on some terminals.) Read More »