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command line search and replace

How do you replace multiple words in Windows? How do you replace a string in Unix without opening the file?

command line search and replace
How do you replace multiple words in Windows?

The base command for you case looks like this: sed -i 's|oldvalue|newvalue|g' file1 file2 file3. If all your file are in the directory ~/foo/bar/ , what you want to do is: