Refer: http://www.linux-hardware-guide.com/2013-12-24-brother-p-touch-pt-2430pc-label-maker-usb
$ sudo apt-get install libgd-gd2-perl libgtk2-gladexml-perl
Download this software:
blabel_0.07-1_all-deb.zip
Refer: http://apz.fi/blabel/
$ sudo dpkg -i blabel_0.07-1_all.deb
$ sudo apt-get install -f
Switch the printer to 'extended' mode (flip the switch at the back to 'E'), connect it to your box and turn the printer on. Add it as a ASCII-printer (the printer driver should say "Generic text-only printer"), this happens in Ubuntu.
Switch it back to EL for Windows
$ blabel
Monospace 20, put 9 spaces in front of text and 1 space at end
Center, Middle, PT-2430PC, Inverse