I\'m trying to install Oracle Database in (X)ubuntu 13.04 64-bit using this guide. Everything goed well until I get to the following step:
$ sudo /etc/init.d/ora
This link looks like it has the answer. You need to make sure that /dev/shm is mounted on your system, and assign it memory of at least MEMORY_TARGET.
You can do this by adding the following to your fstab, and rebooting. (This will set the /dev/shm size to 2gb):
shmfs /dev/shm tmpfs size=2048m 0 0