Install latex-cjk-korean by entering the following commands in the terminal:
sudo apt update sudo apt install latex-cjk-korean
Description:
Korean module of LaTeX CJK
CJK is a macro package for LaTeX. This package gives you the possibility to include Korean text in your (La)TeX documents.
Homepage: http://cjk.ffii.org/
Version: 4.8.4+git20170127-2
Section: universe/tex