PuTTY and VT100 box-drawing character

Refer to this link: Making 256-color AND Line drawing characters both work in PuTTY

Add this into your .bashrc:

export NCURSES_NO_UTF8_ACS=1

Then re-login.

If you want to keep this when using sudo, add this into your /etc/sudoers:
Defaults env_keep += "NCURSES_NO_UTF8_ACS"

Then restart the sudo service.