If emoji icons (
,
, etc.) are not displaying correctly in terminal output (Or browser), install the Noto Color Emoji font:
sudo apt-get update
sudo apt-get install fonts-noto-color-emoji
fc-cache -f -v
After installation, restart your terminal or log out and back in (reboot is also a good option).
If emojis still don’t display, ensure your locale supports UTF-8:
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8