cmd='sudo nohup tshark -f "(host 192.168.61.11 and icmp) or (not host 192.168.61.11 and not host 192.168.61.30 and not arp and not port 53 and not port 2152)"'
cmd='sudo nohup tshark -f "(host 192.168.72.135 and icmp) or (not host 192.168.72.135 and not host 192.168.71.150 and not arp and not port 53 and not port 2152 and not port 2153)"'