This post explains how to install Quasar 2.2.0 on Ubuntu 12.04. Quasar is the best linux medium to large size business accounting program in my opinion. You can visit there website ate http://www.linuxcanada.com
download quasar single form
ftp://linuxcanada.com/pub/Quasar/2.2.0/binaries/
And you'll need libicu44
http://packages.ubuntu.com/oneiric/libicu44
I'd also suggest that you install postgresql before you install quasar-single so that you get the Postgresql-9.1 instead of 8.4 which it will want to install.
sudo apt-get install postgresql postgresql-contrib polymer qt3-qtconfig
Then install the rest of the packages. What I do more times is just download all of the above into one directory and install everything in that directory. Lets say for instance you'd download everything to ~/Downloads/Quasar/ You would then do the fallowing.
cd ~/Downloads/Quasar/
dpkg -i *
apt-get install -f
To make Quasar and other Qt3 apps look good open qtconfig and make the fallowing changes
Appearance > GUI Style > Polymer
Fonts > Family > Sans Serif
Fonts > Point Size > 9
you might also what to alter the color skeme a bit
Appearance > Tune Palette
I may post later on how to set up Postgresql further so that you can access it via pgadmin and remote computers. But just to run Quasar that is not needed.
Many times you'll notice you can't print from Quasar. To fix it run
sudo ln -s /var/run/cups/printcap /etc/printcap