Thanks for your comments.
When I run
curl -O https://downloads.rclone.org/rclone-current-linux-amd64.zip
I get an error message that the zip file is corrupted or incomplete. I’ve tried this several times.
I also can’t find an Ubuntu repository for rclone. I use Synaptic Package Manager, and it can’t find it.
I was running Ubuntu 14.0.4 LTS, upgraded today to 16.0.4 LTS - same behaviors.
Stuck at this point…