Unfortunately, any command that includes 'install", "remove", "fix", etc is stopped because I have not "corrected the problem", to wit:
"sudo apt-get --no-remove -f install
[sudo] password for me:
E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.
me@e531:~$ sudo dpkg --configure -a
Setting up exim4-base (4.86~RC4-2) ..."
Then terminal freezes - let it sit for a long time, perhaps an hour or more. Nothing happens.