Tag Archives: stupidity

My new password

I’m changing all my passwords to asterisks: ******** Now, when I enter my password, I can see what I’m typing.

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December is a bad month for Linux system administration

The system load for Linux is an indication of how busy the system is, and how long you are going to wait to get something done.  When the load is 0.0, that means that the system is ready to do … Continue reading

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ERROR 1305 (42000): FUNCTION eval does not exist

MySQL cluster – a wonderful idea.  It’s really nice: you have a front end, and multiple redundant back ends, and all the data is loaded into memory, so things go very fast, even queries that inefficiently scan vast squabs of … Continue reading

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MD and LVM ate my file system … and gave it back

So we have this computer that has two 250Gb disks. In the interest of keeping the data, for evah I set them up as RAID1 using Linux MD RAID. This was cool. Much as a proper technical person does not … Continue reading

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Not your regular bot driven UDP flood

After weeks of battling Joomla/JCE sites that insist on running evil code and spewing denial of service traffic, we had a machine today sending UDP floods. This, it turns out, is not a hacked machine sending spews of botnet traffic … Continue reading

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Unicast flooding meets promiscuous routing

To make a disaster, you need a perfect storm of mistakes. A single mistake is insufficient, but a stack of sub-obtimal configuration choices stacked together will give you rampant failure and poor network quality. For today’s mistake we have massive … Continue reading

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PHP deobfuscation

One of the things that you see with depressing regularity when hosting crummy PHP scripts for others is this: eval&28;base64_decode&28;’aWYgKCFlbXB0eSgkX1JFUVVFU1RbInRoZW What’s that? Well it says to decode that gobbledegook into a binary stream (the base64_decode part), and then interpret whatever … Continue reading

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Floating to 0.999 on the MySQL cloud

This code: REPLACE INTO loadtable (`hostname`,`load`) VALUES (‘server1′,2.093); didn’t work. It worked in my testing from my local machine, but I ended up with this when I ran it from a real machine: load host 0.309 desktop1 0.201 desktop2 0.172 … Continue reading

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How to change the oil on your car

I changed the oil in my car. Not only that, but I also changed the air filter and spark plugs. It was great. Here is how you do it. You will need the following supplies. Most of these are readily … Continue reading

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Vet your pet doctor carefully

So we had this cat – it was called Nyip.  Having a cat meant that we did not have birds in our garden, which was bad, but more specifically, we did not have birds in our fruit trees, which was … Continue reading

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