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  • This will not work when we want to read from multiple files, what will be the solution for tcpdump -l -r file1,file2 e.g. ? tail -c +1 -f file1 -f file2 | tcpdump -l -r - will not work since tail will output some extra lines while tailing multiple files Commented Apr 9, 2021 at 13:14
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    @Dipto I guess you could simply two or more of these pipe command lines in backround. ( tail -c +1 -f a.pcap | tcpdump -l -r - & tail -c +1 -f b.pcap | tcpdump -l -r - & ) Commented Apr 13, 2021 at 23:08
  • Thanks. But what I found is tcpdump -r /Path/to/pcap is able to follow the file in realtime as it is. May be OP is facing another problem superuser.com/questions/735017/… Commented Apr 16, 2021 at 11:58