I tried to move a file into the rubbish bin (because I followed some instructions about installing sage and it involved moving a file to that directory) and it gave me errors saying that I didn't have permission. Even though I'm signed in as an administrator.
Open a terminal with
If you want to delete the entire content of a folder, you should use
Please, make sure you aren't deleting any system files. Also double check the file and folder name before hitting Enter key.