fonts-tlwg-purisa software package provides Thai Purisa font, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install fonts-tlwg-purisa
fonts-tlwg-purisa is installed in your system.
Make ensure the fonts-tlwg-purisa package were installed using the commands given below,
$ sudo dpkg-query -l | grep fonts-tlwg-purisa *
You will get with fonts-tlwg-purisa package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Fonts |
| Package | fonts-tlwg-purisa |
| Version | 1:0.4.17-1ubuntu1 |
| Description | Thai Purisa font |
| Sub Section | Fonts |