:~/home:michals/python-python-prctl> cp /usr/bin/ping . :~/home:michals/python-python-prctl> ./ping -c1 localhost PING localhost(localhost (::1)) 56 data bytes 64 bytes from localhost (::1): icmp_seq=1 ttl=64 time=0.072 ms --- localhost ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.072/0.072/0.072/0.000 ms so indeed ping is the wrong test - it no longer needs any special capability.