fping 的優點：

1. 可以一次ping多個主機

2. 可以從主機列表文件ping

3. 結果清晰 便于腳本處理

4. 速度快

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有用的參數：

-g ping 網段

-s 顯示統計

-r 1 設置重試次數

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Usage: fping [options] [targets...]

-a???????? show targets that are alive

-A???????? show targets by address

-b n?????? amount of ping data to send, in bytes (default 56)

-B f?????? set exponential backoff factor to f

-c n?????? count of pings to send to each target (default 1)

-C n?????? same as -c, report results in verbose format

-e???????? show elapsed time on return packets

-f file??? read list of targets from a file ( - means stdin) (only if no -g specified)

-g???????? generate target list (only if no -f specified)???????????? (specify the start and end IP in the target list, or supply a IP netmask)???????????? (ex. fping -g 192.168.1.0 192.168.1.255 or fping -g 192.168.1.0/24)

-i n?????? interval between sending ping packets (in millisec) (default 25)

-l???????? loop sending pings forever

-m???????? ping multiple interfaces on target host

-n???????? show targets by name (-d is equivalent)

-p n?????? interval between ping packets to one target (in millisec)???????????? (in looping and counting modes, default 1000)

-q???????? quiet (don't show per-target/per-ping results)

-Q n?????? same as -q, but show summary every n seconds

-r n?????? number of retries (default 3)

-s???????? print final stats

-t n?????? individual target initial timeout (in millisec) (default 500)

-u???????? show targets that are unreachable

-v???????? show version

targets??? list of targets to check (if no -f specified)

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