Ping command – test network connectivity between hosts

ping The command is mainly used to test the network connectivity between hosts , It can also be used for . perform ping Command will use ICMP Transfer protocol , Send a message asking for a response , If there is no problem with the network function of the remote host , They'll respond to the message , So we know that the host is working normally .

But it is worth noting that ：Linux Under the system ping Command and Windows Under the system ping The order is slightly different .Windows Run under ping Commands are usually issued 4 A request ends running the command ; and Linux It will not automatically terminate , At this point, we need to press CTR+C Termination or use -c Parameter is ping Command specifies the number of requests sent .

Grammar format ：ping [ Parameters ] [ The target host ]

Common parameters ：

-d	Use Socket Of SO_DEBUG function
-c	Specify the number of times to send messages
-i	Specify the time interval between sending and receiving information
-I	Send packets using the specified network interface
-l	Set before sending the required information , Packets sent first
-n	Output only values
-p	Set the template style to fill the packet
-q	Do not show instruction execution
-R	Record the routing process
-s	Set packet size
-t	Set the survival value TTL Size
-v	Display the execution process of the instruction in detail

Reference examples

Testing and linuxcool The connectivity of the website ：

[[email protected] ~]# ping www.linuxcool.com

continuity ping4 Time ：

[[email protected] ~]# ping -c 4 www.linuxcool.com 

Set times to 4, The time interval is 3 second ：

[[email protected] ~]# ping -c 4 -i 3 www.linuxcool.com

utilize ping Command to get the name of the specified web site IP Address ：

[[email protected] ~]# ping -c 1 linuxcool.com | grep from | cut -d " " -f 4
220.181.57.216