For some reason I now get the following output whenever I open a new terminal.
No command 'Not' found, did you mean:
Command 'jot' from package 'athena-jot' (universe)
Command 'hot' from package 'hopenpgp-tools' (universe)
Command 'dot' from package 'graphviz' (main)
Not: command not found
There is nothing obvious in bashrc or my environment. A grep for 'Not' turned up blank.