How to install sinhala fonts on ubuntu

First you have to download the font file "filename.ttf" to you machine.
Then you need some permissions to add those files to folder named
/usr/share/fonts/truetype
To do that first goto truetype folder by using following command

sanjeewa@sanjeewa-laptop:~$ cd /usr/share/fonts/truetype

Then use next command to grant file permissions to that folder(Else you wont be able to copy files to that folder)

sanjeewa@sanjeewa-laptop:/usr/share/fonts/truetype$ sudo chmod 777 ttf-sinhala-lklug/

Then copy your font file into folder named ttf-sinhala-lklug/

Then refresh browser