#!/bin/bash ranks=(1 2 3) # manually set these two lines streams=(11 12 8) outdir="rtt/dur/" for i in "${ranks[@]}" do echo "getting RTT samples rank ${i}..." tshark -Y "tcp.stream == ${streams[$((i-1))]}" -r univ1_pt13 -Tfields -e frame.number -e tcp.analysis.ack_rtt -E header=y -E separator=, > $outdir/r${i}.csv #echo ${ipsa[$((i-1))]} done echo "done"