Ensure the software you are using supports Unicode Tamil fonts.
Copy your downloaded Sangam.ttf files into that directory. Update the font cache: fc-cache -f -v Use code with caution. Copied to clipboard Enabling Tamil Input apt sangam tamil fonts install
$ fc-list :lang=ta /usr/share/fonts/truetype/sangam.ttf: Sangam:style=Regular Ensure the software you are using supports Unicode
-v : Displays verbose output so you can verify the directory was scanned. Verifying the Installation apt sangam tamil fonts install