Miscellaneous Hackery

Annika Backstrom
in misc, on 20 September 2003. It is tagged #Computers, #Mac OS X, #qmail, #hosting, #jvds, #user-mode linux, and #virtualization.

I've been experimenting with User-mode Linux lately. Let's just say I'm impressed. UML allows me to run fully encapsulated Linux systems on my host, fully partitioned out from normal userspace. I'm going to toy around with the possibilities and maybe move some Apache vhosts or other server services inside. (This is useful for damage control in the event of a break-in.)

Here's a Mac OS X tip for y'all: cron on Mac OS X has the ability to run commands only when operating on A/C power:

The command can optionally be prefixed by "@AppleNotOnBattery " to tell cron not to run the command when functioning on battery power. For example, the "sixth" field when using this option would appear something like "@AppleNotOnBattery /usr/bin/touch /tmp/foo"

I signed up for hosting from JVDS. \$20 a month gives me root on my own Slackware Linux 9.0 UML. I've been configuring it over the past few days, and initial impressions are very good. I've configured BIND to be the name server for my new domain, and Apache is happily serving up several vhosts. Let me also say that qmail is the most wonderful piece of software in the world. It loves Maildir even more than I do, which is saying a lot.