ping 命令

常用示例

说明

ping uses ICMP ECHO_REQUEST packets to test network connectivity to a host. It measures round-trip time (RTT) and packet loss, making it essential for network troubleshooting and monitoring. Each response shows the sequence number, TTL, and time in milliseconds. The TTL value indicates how many router hops occurred (starting from the remote host's initial TTL, typically 64 or 255). Statistics at the end show packets transmitted/received, loss percentage, and RTT min/avg/max/mdev. The command requires network access and may need root privileges for some options like flood ping. On many systems, ping6 or ping -6 is used for IPv6 targets.

参数

-c _COUNT_

Stop after sending COUNT packets

-i _INTERVAL_

Wait INTERVAL seconds between packets (default: 1)

-s _SIZE_

Packet data size in bytes (default: 56, total 64 with ICMP header)

-t _TTL_

Set IP Time To Live

-w _DEADLINE_

Exit after DEADLINE seconds regardless of packets

-W _TIMEOUT_

Wait TIMEOUT seconds for each response

-q

Quiet output; only show summary

-v

Verbose output

-a

Audible ping (beep on reply)

-f

Flood ping; send packets as fast as possible (root only)

-n

Numeric output only; don't resolve hostnames

-4

Use IPv4 only

-6

Use IPv6 only

-I _INTERFACE_

Use specified network interface or address

-R

Record route (IPv4, may be ignored by hosts)

-D

Print timestamps

-Q _TOS_

Set Quality of Service bits

-p _PATTERN_

Fill packet with specified pattern bytes