I am using Powerline in my terminals and had an issue with the font. After messing with it I realize I was using a font that has not been patched for Powerline. I changed the gnome-terminal font from "Fira Mono Regular"
to "DejaVu Sans Mono Book" and it worked.
My steps on Pop! OS which is an Ubuntu 18.10 flavor.
# apt install powerline $ rrosso ~ tail .bashrc # Powerline if [ -f /usr/share/powerline/bindings/bash/powerline.sh ]; then source /usr/share/powerline/bindings/bash/powerline.sh fi
Note you may need to regenrate the font cache or restart X