How do I repeat last command in Unix ksh?

Been away from Unix for a long time. How do I make Unix repeat the last command entered. I'm using ksh

How do I repeat last command in Unix ksh?
I think the answer you're probably looking for is


simply to turn on "command line editing". This


essentially gives you a one-line "vi" or "emacs"


editor on the command line history.





To use "vi" mode, enter the command:





    set -o vi





You then need to hit the "escape" key whenever


you want to edit your history. To recall the


last command, just type "k" (which is "up" in


"vi"), which will display the last command. You


can move around with normal editing commands


like "$" (go to end of line), "fx" to find the


letter "x", or just hit the "return" key to


enter the command. By the way, instead of


using "k" to go back a single command, you can


use "/pattern" to search for the last command


which contained "pattern" (since "/" is the


search command).





In summary, to re-do the last command:





    1) hit the escape key to enter edit mode


    2) press the "k" key to go back one line


    3) press the "enter" key to execute the command








To use the "emacs" mode instead, enter the command





    set -o emacs





In this case, you can go up and down in the history


by using ^p ("control p" for previous line),


^n (next line), ^f (forward one character),


^b (backward one character).





So, to re-do the last command:





    1) "^p" (hold down "control" key and strike "p")


    2) press the "return" key to execute the command





All that being said, there is *another* history


mechanism in ksh that you might be asking about.


It is the "fc" command (see "man fc"). There's


usually an alias called "r" for a specific "fc"


command, which can be used to re-execute the


previous command:





    $ alias r


    r='fc -e -'





By typing "r" followed by the "return" key, you


will re-do the last command. Similarly, if you


type "r pattern" followed by the "return" key,


you will re-do the last command which contained


"pattern".





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