Remove blank lines with grep


Remove blank lines ( new line ) with grep
echo -e "a\n\nb" | grep -v '^ *$'

or

grep -v '^[\s\t]*$' file.txt  > new_file.txt

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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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