Although this process is well documented on the Ubuntu community site, I decided to take notes of the exact steps that I took so that I wouldn't have to fumble through that long document next time. I'm installing the tools in a clean install of Ubuntu 10.04.2 LTS.
Add this line to
deb http://packages.vmware.com/tools/esx/4.1latest/ubuntu lucid main restricted
The documentation suggests doing this with
apt-add-repository, but I didn't have it installed and you still have to edit
/etc/apt/sources.list to remove the deb-src line.
Now, just run the following commands as root. I've removed the prompt and output so that it should be easier to just cut and paste.
wget http://packages.vmware.com/tools/VMWARE-PACKAGING-GPG-KEY.pub -q -O- | apt-key add - apt-get install vmware-open-vm-tools-kmod-source module-assistant prepare module-assistant build vmware-open-vm-tools-kmod-source module-assistant install vmware-open-vm-tools-kmod apt-get install vmware-open-vm-tools-nox
I rebooted after that, just to make sure everything loaded up correctly.
Remember that you'll need to do this after every kernel upgrade!