Linux 网络工具之fping

系统中有个最最常用命令工具--ping,而fping 是ping 工具的加强版本。安装过程很简单：

[root@mail /]# wget --limit-rate 500k http://www.fping.org/dist/fping-3.8.tar.gz

[root@mail /]# tar zxvf fping-3.8.tar.gz && cd fping-3.8

[root@mail /]# ./configure && make && make install

 

[root@mail /]# fping --help

fping: invalid option -- '-'

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

   -D         print timestamp before each output line

   -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)

   -H n       Set the IP TTL value (Time To Live hops)

   -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

   -I if      bind to a particular interface

   -S addr    set source address

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

   -T n       ignored (for compatibility with fping 2.4)

   -u         show targets that are unreachable

   -O n       set the type of service (tos) flag on the ICMP packets

   -v         show version

 

实用案例

• 例出局域网中存活的主机

[root@mail /]# fping -a 192.168.0.1/24 -g 2> /dev/null

192.168.0.1

192.168.0.3

………………

• 查询DNS

fping 有一个-d ,它通过每一个echo 回应进行DNS查询来返回主机名。使用该选项可以在ping 的回应信息中打印出主机名而非IP地址

[root@mail /]# cat ip_list.txt

192.168.20.5

192.168.20.11

192.168.20.53

192.168.20.241

……………………

[root@mail /]# fping -a -d 2>/dev/null < ip_list.txt

www.vqiu

dns.vqiu