I have several files in the same folder that have one element in common in the names. How do I rename the files so that the common element in the names is deleted?
The way I always do it: Thunar bulk rename.
sudo apt install thunar
Now open bulk rename (if you're using basic 16.04 version, just go to dash home and type bulk: you'll get it.)
Options are pretty obvious from there.
I know, I know, some geek will tell me I should have done it from the command line. And that's doable too, but you'd need to be a bit more specific on exactly what you want to get a specific command.