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Category Archives: System Administration
How to get a Free and Valid SSL Certificate
Why do you need a SSL certificate? Short answer: to enable encryption! For example, if you are running a web-site and *any* part of it requires authentication, then you should enable SSL. For the whole site. No, you can’t just … Continue reading
IPMI SOL – Inexpensive Remote Console
I used to think that every server needed to have something like a DRAC (Dell Remote Access Card) or IBM RSA (IBM Remote System Administration) to be really manageable remotely. But the problem is that they are expensive and they … Continue reading
Process Substitution – Subshells that Rock
If you are new to the world of *nix operating systems, you might still be wrapping your head around the concept of pipes. But if you spend any time at the command line, it won’t be long before you are … Continue reading
Common Cron Mistakes
I’ve been working with personal computers for awhile. I’m not quite from the punch card era, but I do fondly remember saving my prime number sieve program, written in basic, to an audio cassette attached to a Commodore Vic-20. Somewhere … Continue reading
Project Hydra: the USB Multiheaded Monster
“You have a bunch of servers to administer, not enough consoles and a small budget. Roll your own serial console server with USB.” This is a paper I wrote for Linux Journal after playing around with using USBserial adaptors to … Continue reading