January 2012
3 posts
2 tags
Fix missing eth0 after changing network cards
After changing hard drives out of one server machine into another and booting, the network interface didn’t come up correctly. eth0 didn’t exist and gave an error when I tried to start it manually using ifup eth0. At first I suspected that the correct driver module wasn’t installed because the OS had been installed on another system with a different NIC; so I verified that the...
2 tags
Restore the Linux console messages on boot
When I installed Ubuntu Lucid on a physical server for the first time I was unnerved by seeing a startup progress indicator when I’m used to seeing all the console messages scrolling by. If something is taking a long time, I want to see what it is. I know you can switch to VT-7, but I want them back on the main screen where they’re easy to see (and easy for someone else to see if...
3 tags
Installing 32 bit PostgreSQL on 64 bit Linux
During an emergency server upgrade last week I was faced with a problem. I’d installed 64 bit Linux to replace a 32 bit Linux box, copied across the PostgreSQL data directory, then installed the identical version of PostgreSQL, but 64 bit. It turns out that the data file format is incompatible between 32 and 64 bit PostgreSQL.
PostgreSQL is my favourite RDBMS, but it’s worth noting...