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```
vi file.txt
vim file.txt
```


gg     goes to top of file. NNgg goes to line NN. NN means an integer 
+OK?
...

Note Backspace will more you backwards (ie navigates but no deletion i
+n nav mode) but 
DEL deletes as normal (ie no navigation stuff disappears). GOK.

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:w     writes file
:w!    writes file even if read only
...
             ie !./script while you are editing 'script' it will exec 
+it.
             hit enter to return to vi as prompted, else type more com
+mands.....
:%perldo s/this/that/   execs that perl s///

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a     Insert after the current cursor pos 
A     Insert after the end of current line
i     Insert before the current cursor pos
I     Insert at the begining of the current line