Grepping a single line from iftop

Question

iftop -t -L1 -s1

Output:

iftop -t -L1 -s1 | grep "Total send and receive rate:"

Output:

How can I grep just the "Total send and receive state:" line?

Answer 1

It seems that iftop is writing the unwanted lines to STDERR. To remove those for your grep use a command line as follows.

iftop -t -L1 -s1 2> /dev/null | grep "Total send and receive rate:"