Shell Programming and Scripting

alias m 'if ( \!:$ =~ *gz) set status = 1 &&  most  \!:$ || gzcat \!:1 | most  '

true && echo "This will print"
false && echo "This will not"
true || echo "This will not print"
false || echo "But this will"

Event Designators
       An  event  designator  is a reference to a command line entry in the history list.  Unless the reference is
       absolute, events are relative to the current position in the history list.

       !      Start a history substitution, except when followed by a blank, newline,  carriage  return,  =  or  (
              (when the extglob shell option is enabled using the shopt builtin).
       !n     Refer to command line n.
       !-n    Refer to the current command minus n.
       !!     Refer to the previous command.  This is a synonym for `!-1'.
       !string
              Refer  to  the  most recent command preceding the current position in the history list starting with
              string.
       !?string[?]
              Refer to the most recent command preceding the current  position  in  the  history  list  containing
              string.  The trailing ? may be omitted if string is followed immediately by a newline.
       ^string1^string2^
              Quick  substitution.   Repeat  the  previous command, replacing string1 with string2.  Equivalent to
              ``!!:s/string1/string2/'' (see Modifiers below).
       !#     The entire command line typed so far.