Ubuntu getting slow....

The day I installed Ubuntu and the day after few upgrades.. I noticed drastic decrease in speed. I thought the problem was with my user, so I deleted the configuration files within my ~/ folder many times but never got a preferred result. Nautilus took 10-20 sec to just open, furthermore my gnutop went indiscoverable in my Hostel's LAN Server and I was receiving error messages after login. The symptom which took me towards the solution to this problem was, I got this message everytime I used sudo :

sudo: unable to resolve host HOSTNAME

After a bit of googling I found that it was already reported : Bug #195308.

Here is the solution (if it ever happens to you):

• Open Terminal
• Edit your /etc/hosts file

  sudo vim /etc/hosts



• There replace :

  127.0.1.1 hostname.domainname

  with

  127.0.1.1 hostname

  
  Example in my case:
  Hostname : gnutop
  Domainname: workgroup


• Save and Exit

This worked for me as a charm and thought of removing Ubuntu remained a thought.. now Ubuntu is as fast as ever.