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Tests whether or not a give host is online
This entry is for the historical no longer used version of ping, modern versions are under projects with different names, such as GNU inetutils
The Ping utility is essentially a system administrator's tool that is used to see if a computer is operating and also to see if network connections are intact. Ping uses the Internet Control Message Protocol (ICMP) Echo function. A small packet is sent through the network to a particular IP address. This packet contains 64 bytes - 56 data bytes and 8 bytes of protocol reader information. The computer that sent the packet then waits (or 'listens') for a return packet. If the connections are good and the target computer is up, a good return packet will be received. PING can also tell the user the number of hops that lie between two computers and the amount of time it takes for a packet to make the complete trip. Additionaly, an administrator can use Ping to test out name resolution. If the packet bounces back when sent to the IP address but not when sent to the name, then the system is having a problem matching the name to the IP address.
DocumentationUser guide available in HTML format from http://www.fifi.org/services/ping-help; User manpage available in HTML format from http://linux.com.hk/man/showman.cgi?manpath=/man/man8/ping.8.inc
released on 1986
9 April 2003
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This entry (in part or in whole) was last reviewed on 29 March 2018.
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