talking archlinux questions

[Kyle]

/usr/lib/systemd/system/brltty.service is shipped with the brltty 
package version 4.2-2. If you have installed brltty, you should have it, 
so the

sudo systemctl enable brltty.service

command should work. If not, instead try the full path

sudo systemctl enable /usr/lib/systemd/system/brltty.service

However, the full path shouldn't be needed.
~Kyle
http://kyle.tk/
-- 
"Kyle? ... She calls her cake, Kyle?"
Out of This World, season 2 episode 21 - "The Amazing Evie"