80 lines
1.5 KiB
Markdown
80 lines
1.5 KiB
Markdown
fping
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===
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fping检测主机是否存在
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## 补充说明
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**fping命令** fping类似于ping，但比ping强大。与ping要等待某一主机连接超时或发回反馈信息不同，fping给一个主机发送完数据包后，马上给下一个主机发送数据包，实现多主机同时ping，fping还可以在命令行中指定要ping的主机数量范围。
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### 语法
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```shell
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fping(选项)(参数)
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```
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### 选项
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```shell
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-a # 显示存活的主机
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-b # ping 数据包的大小。（默认为56）
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-c # ping每个目标的次数 (默认为1)
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-f # 从文件获取目标列表(不能与 -g 同时使用)
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-l # 循环发送ping
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-g # 通过指定开始和结束地址来生成目标列表,可以使网段
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-u # 显示不可到达的目标
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```
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### 实例
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安装fping命令：
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```shell
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# 先安装epel源：
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yum install epel* -y
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# 安装fping包：
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yum install fping -y
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```
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选择性ping指定ip：
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```shell
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~]# fping 192.168.0.1 192.168.0.125 192.168.0.126 2>/dev/null
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192.168.0.1 is alive
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192.168.0.125 is alive
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192.168.0.126 is unreachable
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```
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ping整个网段：
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```bash
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~]# fping -g 192.168.0.0/24 2>/dev/null
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192.168.0.1 is alive
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192.168.0.103 is alive
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...
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192.168.0.253 is unreachable
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192.168.0.254 is unreachable
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```
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ping整个网段，只显示存活的主机：
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```shell
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~]# fping -ag 192.168.0.0/24 2>/dev/null
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192.168.0.1
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192.168.0.103
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...
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```
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ping某一段ip：
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```shell
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~]# fping -ag 192.168.0.5 192.168.0.130 2>/dev/null
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192.168.0.103
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...
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192.168.0.125
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192.168.0.130
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```
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