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ping: icmp open socket: Operation not permitted 的解决办法

yyc@localhost ~ $ sudo route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.190.40.0 * 255.255.254.0 U 2 0 0 eth0
loopback localhost 255.0.0.0 UG 0 0 0 lo
default 10.190.40.1 0.0.0.0 UG 2 0 0 eth0

yyc@localhost ~ $ ping 10.190.40.1
ping: icmp open socket: Operation not permitted

yyc@localhost ~ $ ls -l /bin/ping\\
-rwxrwxrwx 1 root root 34628 9月 2 12:15 /bin/ping

yyc@localhost ~ $ sudo chmod u+s /bin/ping

yyc@localhost ~ $ ls -l /bin/ping\\
-rwsrwxrwx 1 root root 34628 9月 2 12:15 /bin/ping

yyc@localhost ~ $ ping 10.190.40.1\\
PING 10.190.40.1 (10.190.40.1) 56(84) bytes of data.\\
64 bytes from 10.190.40.1: icmp_req=1 ttl=255 time=0.871 ms\\
64 bytes from 10.190.40.1: icmp_req=2 ttl=255 time=0.865 ms
^C
--- 10.190.40.1 ping statistics ---\\
2 packets transmitted, 2 received, 0% packet loss, time 1001ms\\
rtt min/avg/max/mdev = 0.865/0.868/0.871/0.003 ms