I can't install the font successfully

Thank you so much for tinkering with the Monaco font.
but when I put them in my /usr/share/fonts/myfonts/ and run 
```shell
sudo mkfontscale 
sudo mkfontdir 
sudo fc-cache -f
```
I still haven't found the monaco font.
I tried other fonts and can find it.

I am currently in Ubuntu20.04 .