Installation of Bitcoin Core 0.18.0 on Ubuntu 18.04.2 error I used "sudo snap install bitcoin-core" and it appeared to install fine except I get the error: "Failed to launch 'Bitcoin Core' Desktop file didn't specify Exec 
Field."  Did I do something wrong?  Maybe I am not finished with the install?  

This is nearly a pristine installation of Ubuntu.  The only other thing I did was run updates and I installed Konsole prior to installing Bitcoin Core.  I ran the "sudo snap install..." command from Konsole.

Thanks to all.
From the command line, I typed '/snap/bin/bitcoin-core.qt' and now Bitcoin Core is synchronizing with the network. Problem solved.

I still don't know how to repair the shortcut but that is because I'm a Linux newbie.