Change file and print changed lines with sed

change file and print changed lines with sed

sed -i 's/8.8.8.8/8.8.4.4/ w/dev/stdout' /etc/resolv.conf
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Monitoring response time with curl

   curl -s -o /dev/null -w "Conecction: %{time_connect}s | Start transfer: %{time_starttransfer}s | Total time: %{time_total}s\n" ...

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