replace string foo to bar AND bar to foo in the same file

[Omer Zak]

Some context is missing - is it an one-shot job to be carried manually,
or do you plan to run it automatically from a script?

In principle, you first do:
  egrep thirdstring *.txt
to make that the string 'thirdstring' does not exist anywhere.
A script would need a way to select another 'thirdstring' if the
original one is already in use.

Then you perform three sed's:
sed -i 's/foo/thirdstring/g' *.txt
sed -i 's/bar/foo/g' *.txt
sed -k 's/thirdstring/bar/g' *.txt

DISCLAIMER: I did not actually run the above code.
--- Omer


On Wed, 2013-09-25 at 14:24 +0300, vordoo wrote:
> Hi,
> 
> I know how to: sed -i 's/foo/bar/g' *.txt
> 
> But how do I: replace string foo to bar AND bar to foo in the same
> file??

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