Particular dbx commands have been renamed to avoid conflicts with ksh commands.
The dbx print command retains the name print; the ksh print command has been renamed kprint.
The ksh kill command has been merged with the dbx kill command.
The alias command is the ksh alias, unless in dbx compatibility mode.
addr/fmt is now examine addr/fmt.
/pattern is now search pattern, and ?pattern is now bsearch pattern.