If you messed up with bashrc file then How to reload skeleton bashrc ?

To do so follow the next steps:

1. Backup your current .bashrc file:
   cp ~/.bashrc ~/.bashrc.bak
2. Copy the skeleton .bashrc file over yours:
   cp /etc/skel/.bashrc ~/
3. Afterwards, load the new one:
   source ~/.bashrc

Ubuntu 12.04 - Not able to open software center

Try following commands -

sudo rm -rf /var/lib/apt/lists

sudo apt-get update


Then try opening ubuntu software center.

Comments would be appreciated  :)

If Below error occurred

Then follow below steps 

sudo apt-get clean
cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get clean 
sudo apt-get update

 Courtesy:http://ubuntuforums.org/showthread.php?t=1983220#8

installing pgsql on ubntu

sudo apt-get install php5-pgsql

Clear Recent files in ubuntu

sudo apt-get install activity-log-manager

Clear Recent files in ubuntu

sudo apt-get install activity-log-manager

Ubuntu 12.04 is not shutting down properly?

Try this

open terminal

sudo gedit /etc/default/grub

In this file replace

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
 
 by

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force"


Then restart.