March 14, 2010
Once again, it’s time for every clock in America to be messed with. According to the most optimistic estimates from the Department of Energy, this will provide a savings of 0.03% on the country’s annual electricity consumption. According to actual measurements from a study in Australia, it’ll achieve nothing. According to an NBER study of [...]
Filed under: System administration | Comments (0)
November 20, 2009
The worst thing about commercial Linux is RPM. I can never remember the command line incantations required for even fairly simple tasks.
While yum eventually takes away the pain of applying software updates–so long as you’re not in a hurry–there are all kinds of other tasks it doesn’t handle. I therefore rely on an RPM [...]
Filed under: Linux, System administration | Comments (0)
July 20, 2009
Default inode allocations for ext3 can be excessive, and result in a lot of wasted disk space.
Filed under: Linux, System administration | Comments (0)
May 21, 2009
A flaw in the SSH protocol is starting to get more widespread attention.
It appears that a workaround is available: disabling CBC ciphers in favor of CTR. To do so, edit /etc/ssh/sshd_config and add the following:
Ciphers arcfour128,arcfour256,arcfour,aes128-ctr,aes192-ctr,aes256-ctr
That’s the default list of SSH ciphers, minus the CBC ones.
Filed under: Linux, System administration | Comments (0)
May 8, 2009
apt-get install openjdk-6-openjdk icedtea6-plugin
update-java-alternatives -s java-6-openjdk
For some inexplicable reason, Eclipse for Java Developers doesn’t include JDBC.
Eclipse J2EE edition doesn’t work with OpenJDK.
Oh well.
Filed under: Java, Linux, System administration | Comments (0)
January 6, 2009
I’ve decided that 2009 is the year I go IPv6, so I’ve been getting all my machines ready. The Macs were no problem, of course: they work with IPv6 without doing anything. Linux is more problematic.
Ubuntu 8.10 and up support IPv6, but come with it turned off in places. The first place is /etc/avahi/avahi-daemon.conf where [...]
Filed under: Linux, Macintosh, System administration | Comments (0)
January 3, 2009
Once upon a time there was a small web hosting company called Lagomorphics LLC. They ran a blogging service called JournalSpace. It was hosted on Mac OS X servers. By way of backup, they had a second hard drive mirroring their main database.
At some point, they caught their IT guy stealing from the company. They [...]
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