Korn Shell (ksh)

dbx supports the KornShell (ksh) command syntax, including branching and looping, environment variables, history, and command-line editing. :
ksh Aliases The list of builtin aliases
ksh Backslash The list of backslash escapes recognized by kprint
ksh Builtins The list of builtin commands
ksh Differences Known differences between the dbx interpreter and ksh
ksh Environment Variables The list of predefined variables
ksh Expressions Using ksh expressions, $[] language expressions, etc.
ksh Options set -o options
ksh Syntax A simplified ksh grammar
ksh Variables Setting, testing, modifying ksh variables