SHELL
This mud implements a limited form of the common shell syntax found in UNIX command shells like csh and bash. For example:
! Repeats the most recently entered command.
!! Repeats the most recently entered command.
!<exp> Repeats the most recently entered command beginning with <exp>.
!<num> Repeats the command numbered <num> (see history).
^x1^x2 Replaces expression x1 with expression x2 in the
history for the most recently entered command.