fping 命令

常用示例

说明

fping is designed for scripting and monitoring, offering significant advantages over the standard ping command for checking multiple hosts. It can ping many hosts in parallel and report results in formats suitable for parsing. Unlike ping which waits for each host to respond before continuing, fping sends probes in a round-robin fashion to all targets, then waits for responses. This parallelism makes it vastly faster when checking many hosts. The tool is commonly used in network monitoring scripts, host discovery, and availability checking. The -g option for generating IP ranges enables quick subnet scans. Exit codes indicate overall reachability status, useful in scripts. Output modes range from verbose per-ping information to quiet mode showing only summaries. The alive-only (-a) and unreachable-only (-u) modes simplify parsing when you only need specific results. fping can read targets from files or stdin, enabling integration with other tools. For continuous monitoring, loop mode (-l) with custom intervals provides ongoing status updates.

参数

-a

Show only alive (reachable) hosts.

-u

Show only unreachable hosts.

-g _addr/mask_ or _start end_

Generate target list from CIDR or range.

-f _file_

Read targets from file (- for stdin).

-c _count_

Number of pings to send per target.

-l

Loop: keep pinging indefinitely.

-p _period_

Interval between pings to same target (ms).

-i _interval_

Interval between pings to different targets (ms).

-t _timeout_

Individual ping timeout in milliseconds.

-r _retry_

Number of retries for unreachable hosts.

-s

Print cumulative statistics at end.

-q

Quiet: only show summary.

-e

Show elapsed time for replies.

-A

Show targets by IP address.

-D

Show timestamps before each line.

-S _source_

Set source address.

-b _size_

Ping packet size in bytes.