ping command--linux command to apply a large dictionary 729 commands interpretation

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Ping Command

use the ping command to test connectivity to the target computer. the ping command uses the ICMP Transport protocol to emit information that requires a response, and if the remote host has no problem with the network function, it will respond to the message and be informed that the host is functioning properly.

Command syntax:

ping [ options ] [ target ]

The meanings of the options in the command are as follows is shown.

table ping command options meaning

Options	Meaning
-C < completion times >	Set the number of responses required to complete
-I < The number of seconds to wait between each packet send. The default value is to wait for the 1 seconds
-N	Specifies that only numbers are output. Do not search for the symbolic name of the host address
-S < packet size >	Specifies the number of bytes of data to be sent. The default value is 56
-T < survival value ;	set the Live value TTL size
-B	Allow ping broadcast addresses to be performed
-V	Show verbose output information
-Q	Quiet output
-R	Bypass the normal routing table and send directly to the host on the connection interface
-W < timeout >	The time, in seconds, to wait for a response
-W < due date >	Specify a time-out in seconds
-B	do not allow pings to change the source address of the probe
-L	suppresses the loopback of multicast packets. the ping target only applies to a multicast address
-I < interface address >	Sets the address of the source address to the specified interface
-R	Record routing

Example : Test connectivity to website www.sina.com .

[[Email protected]~]# Ping www.sina.com

PINGjupiter.sina.com.cn (202.108.33.60) bytes of data.

64bytes from 202.108.33.60:icmp_seq=1 ttl=248 time=108 ms

64bytes from 202.108.33.60:icmp_seq=2 ttl=248 time=17.7 ms

64bytes from 202.108.33.60:icmp_seq=3 ttl=248 time=47.0 ms

64bytes from 202.108.33.60:icmp_seq=4 ttl=248 time=22.3 ms

64bytes from 202.108.33.60:icmp_seq=5 ttl=248 time=95.3 ms

........................ (omitted)

Use this command in a Linux system to return ICMP packets without interruption , to stop the test press the [Ctrl + C] key

Example : Test connectivity to the computer 192.168.0.200 , each time the ICMP packet is sent with a size of bytes.

[[Email protected]~]# ping-s 128 192.168.0.200

PING192.168.0.200 (192.168.0.200) (156) bytes of data.

136bytes from 192.168.0.200:icmp_seq=1 ttl=64 time=0.446 ms

136bytes from 192.168.0.200:icmp_seq=2 ttl=64 time=0.278 ms

136bytes from 192.168.0.200:icmp_seq=3 ttl=64 time=0.287 ms

136bytes from 192.168.0.200:icmp_seq=4 ttl=64 time=0.279 ms

136bytes from 192.168.0.200:icmp_seq=5 ttl=64 time=0.286 ms

136bytes from 192.168.0.200:icmp_seq=6 ttl=64 time=0.320 ms

136bytes from 192.168.0.200:icmp_seq=7 ttl=64 time=0.281 ms

........................ (omitted)

Example : Tests connectivity to the computer 192.168.0.200 , sending 4 ICMP packets.

[Email protected] ~]# ping-c 4 192.168.0.200

PING 192.168.0.200 (192.168.0.200) bytes of data.

Bytes from 192.168.0.200:icmp_seq=1 ttl=64 time=0.357ms

Bytes from 192.168.0.200:icmp_seq=2 ttl=64 time=0.287ms

Bytes from 192.168.0.200:icmp_seq=3 ttl=64 time=0.290ms

Bytes from 192.168.0.200:icmp_seq=4 ttl=64 time=0.290ms

---192.168.0.200 ping statistics---

4 packets transmitted, 4 received, 0% packet loss, time3038ms

RTT Min/avg/max/mdev = 0.287/0.306/0.357/0.029 ms

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ping command--linux command to apply a large dictionary 729 commands interpretation