TLDR
Enter a command. For example: sshd, gh release, gcal, git mergetool.

history expansion

 
Reuse and expand the shell history in sh, bash, zsh, rbash and ksh. More information: https://www.gnu.org/software/bash/manual/html_node/History-Interaction.
 
  • Run the previous command as root (!! is replaced by the previous command):
     
    sudo !!
     
  • Run a command with the last argument of the previous command:
     
    {{command}} !$
     
  • Run a command with the first argument of the previous command:
     
    {{command}} !^
     
  • Run the Nth command of the history:
     
    !{{n}}
     
  • Run the command n lines back in the history:
     
    !-{{n}}
     
  • Run the most recent command containing string:
     
    !?{{string}}?
     
  • Run the previous command, replacing string1 with string2:
     
    ^{{string1}}^{{string2}}^
     
  • Perform a history expansion, but print the command that would be run instead of actually running it:
     
    {{!-n}}:p

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