In unix -- What command tells the shell to repeat the last command?

in unix -- What command tells the shell to repeat the last command

In unix -- What command tells the shell to repeat the last command?
!n ---%26gt; executes nth command, e.g. !7





!! ------%26gt; execute previous command





!-n execute previous nth command, e.g. !-1 (is same as !!)





!string execute command that start with string e.g. !cp





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Reply:The Up Arrow key.





Good luck
Reply:if you press r it will execute the last command
Reply:the up arrow key and to go to a command that you did a few commands ago just hit it again.