為 Ubuntu 增加字型 (Add font types in Ubuntu)

將字型檔案放置在 /usr/share/fonts/truetype 中
不過為了容易整理文件，建議先在 /usr/share/fonts/truetype 中建立一個資料夾

Place the font type file to /usr/share/fonts/truetype
We recommend you create a directory in /usr/share/fonts/truetype to manager your customized font type files

sudo mkdir /usr/share/fonts/truetype/custom

放置好所有字型檔案後，在 Terminal 輸入
After place the font type files, open the Terminal and type

sudo fc-cache -f -v

更新字型庫，更新後便可以使用
After update the font types, and you can use the new font types