How to remove all white spaces from a given text file

Question

I want to remove all the white spaces from a given text file. Is there any shell command available for this ? Or, how to use sed for this purpose.

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Answer 1

Try this:

sed -e 's/[\t ]//g;/^$/d' 

(found here)

The first part removes all tabs (\t) and spaces, and the second part removes all empty lines