Unix in a Nutshell, 4th Edition

Command Substitution

Command	Description
!	Begin a history substitution.
!!	Previous command.
! N	Command number N in history list.
!- N	N th command back from current command.
! string	Most recent command that starts with string.
!? string ?	Most recent command that contains string.
!? string ?%	Most recent command argument that contains string.
!$	Last argument of previous command.
!! string	Previous command, then append string.
! N string	Command N, then append string.
!{ s1 } s2	Most recent command starting with string s1, then append string s2.
^ old ^ new ^	Quick substitution; change string old to new in previous command, and execute modified command.