Okay, a bit complex, but if you...

# history

...you get a numbered list. Which if you do...

# !8

...it repeats item eight from the list. And if
you had previously done...

# ls -l

...and it was item seven on the list, then if you
did this...

# !7:s/-l/-a/

...that works as a regular expression substitution
(just like in Perl) and it will be as if you did
this anew...

# ls -a

...instead of "ls -l" which was item seven from the
history list.

It's all in there under...

# man history

...I did not find a way to make it work like "doskey"
in Windoze, where it prints the old up on the screen
for manual editing. Maybe it can do that, but I didn't
find it.

If you do...let me know?

Thanks,

Gan Starling
Kalamazoo MI USA

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re-issue of its 8-bit OS for a 
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