Case-insensitive search and replace with sed

Question

I\'m trying to use SED to extract text from a log file. I can do a search-and-replace without too much trouble:

sed \'s/foo/bar/\' mylog.txt

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Answer 1

The Mac version of sed seems a bit limited. One way to work around this is to use a linux container (via Docker) which has a useable version of sed:

cat your_file.txt | docker run -i busybox /bin/sed -r 's/[0-9]{4}/****/Ig'