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 dbxkill command.
The alias command is the ksh alias command, unless in dbx compatibility mode.
address/format is now examine address/format.
/pattern is now search pattern.
?pattern is now bsearch pattern.