I used sysadmin Notebook to install oracle 11gR2 xe on my ubuntu 16.04 (64 bit) pc. The problem is when I executed
sudo service oracle-xe start
command, it should give some output like
user@machine:~$ sudo service oracle-xe start
Starting Oracle Net Listener.
Starting Oracle Database 11g Express Edition instance.
according to the site, but in my case, there's no output. How do I know if it's installed correctly? Also if it's not installed correctly, then how do I remove it completely (so that I can reinstall it)?