I'm using a samsung chromebook and crouton to attempt to install pgsql on Ubuntu 12.04.
As root, I can excute the following command succesfully:
# sudo apt-get install postgresql postgresql-contrib
However when I try to switch users, the following occurs:
# sudo su - postgres
ln: failed to create symbolic link `/var/lib/postgresql/.pulse/default.pa': Permission denied
Am I missing something?