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!!$ - last argument from previous command
!!^ - first argument (after the program/built-in/script) from previous command
!!* - all arguments from previous command
!! - previous command (often pronounced “bang bang”)
!n - command number n from history
!-n - last n command, counting from last executed command (!! == !-1)
!pattern - most recent command matching pattern
!!:s/find/replace - last command, substitute find with replace

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