ping(8) iptuils ping(8) ping - ICMP ECHO_REQUEST ping [-aAbBdDfhLnOqrRUvV46] [-c count] [-F flowlabel] [-i interval] [-I interface] [-l preload] [-m mark] [-M pmtudisc_option] [-N nodeinfo_option] [-w deadline] [-W timeout] [-p pattern] [-Q tos] [-s packetsize] [-S sndbuf] [-t ttl] [-T timestamp option] [hop ...] destination ping ICMP ECHO_REQUEST ICMP ECHO_RESPONSE ECHO_REQUEST "ping" IP ICMP "pad" ping IPv4 IPv6 -4 -6 ping IPv6 Node Information Quries, RFC4620 hop IPv6 RFC5095 -4 IPv4 -6 IPv6 -a Audible ping. -A ping -b ping -t ttl ping IP TTLTime to Live -T timestamp option IP timestamp option tsonly tsandaddr tsprespec host1 [host2 [host3 [host4]]] -U ping DNS -v -V -c count () count count () -d SO_DEBUG Linux -D UNIX + gettimeofday -f ping ``.'' -i wait wait -f -l preload preload ping -n -p pattern 1616``-p ff''1 -q -R IP9 -r ( routed ) -s packetsize 56 8 ICMP 64 ICMP -w waitsecs waitsecs ping ping / / ()SIGINT ping1 20 ICMP IP20ICMP8 ( 56)ICMPIP8 (ICMP) 8ping8 8 ping () 1000 ping-p IPTTLIP TTL1 TCP/IPTCPTTL60(4.3 BSD 30, 4.215) 255UNIXICMPTTL 255``ping''telnet(1)ftp(1) pingTTLping TTL 4.3BSD-Tahoe releaseBerkeley Unix TTL255 255 Berkeley Unix TTL255ping ICMPTCP30 60(meaculpa@21cn.com) o RECORD_ROUTE o IP RECORD_ROUTE) o ping netstat(1), ifconfig(8). ping 4.3BSD Linux s20160815 ping6 ping ping6 ping ping CAP_NET_RAW 1) non-echo -N 2) non-raw ICMP 3) ICMP echo ID root ping iputils http://www.skbuff.net/iputils/iputils-current.tar.bz2. man man https://github.com/man-pages-zh/manpages- zh iputils-161105 20161110 ping(8)