115: SSH over the Internet!

(why didn't I find this sooner?)

There are several services available. I chose remot3.it. Their web page leaves certain info gaps (duh) but with my daughter's help I got 3 Pi Zeros connected. Just like local SSH! Unlike just replacing files you can interactively update cron or edit a file with nano. And the "private" account is free (so far). Unfortunately, you have to go through several web clicks to get a sort-of "session ID number" (my term) to do a remote SSH connection. Still, very nice.