Today when installing the most current alacritty version on my new machine, I have encountered errors when trying to clear the screen or using tmux into alacritty.

Here are the errors and how I fixed it:

❯ clear
'alacritty': unknown terminal type.

❯ tmux
missing or unsuitable terminal: alacritty

Here is how to solve that:

$ curl -sSL https://raw.githubusercontent.com/alacritty/alacritty/master/extra/alacritty.info | tic -x -

This will download the terminfo file and apply it.