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ipcalc
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===
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简单的IP地址计算器
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## 补充说明
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**ipcalc命令** 是一个简单的ip地址计算器，可以完成简单的IP地址计算任务。
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### 语法
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```
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ipcalc(选项)
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```
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```
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-b：由给定的IP地址和网络掩码计算出广播地址；
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-h：显示给定UP地址所对应的主机名；
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-m：由给定的IP地址计算器网络掩码；
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-p：显示给定的掩码或IP地址的前缀；
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-n：由给定的IP地址和网络掩码计算网络地址；
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-s：安静模式；
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--help：显示帮助信息。
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```
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### 实例
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```
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[root@localhost ~]# ipcalc -p 192.168.2.1 255.255.255.0
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PREFIX=24
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[root@localhost ~]# ipcalc -n 192.168.2.1 255.255.255.0
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NETWORK=192.168.2.0
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[root@localhost ~]# ipcalc -h 127.0.0.1
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hostname=localhost.localdomain
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[root@localhost ~]# ipcalc -m 192.168.2.1
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NETMASK=255.255.255.0
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[root@localhost ~]# ipcalc -pnbm 192.168.2.1 255.255.255.0
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NETMASK=255.255.255.0
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PREFIX=24
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BROADCAST=192.168.2.255
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NETWORK=192.168.2.0
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```
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