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# ipcalc
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## 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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## 选项
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```markdown
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-c, --check Validate IP address for specified address family
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-4, --ipv4 IPv4 address family (default)
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-6, --ipv6 IPv6 address family
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-b, --broadcast Display calculated broadcast address
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-h, --hostname Show hostname determined via DNS
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-m, --netmask Display default netmask for IP (class A, B, or C)
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-n, --network Display network address
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-p, --prefix Display network prefix
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-s, --silent Don't ever display error messages
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```
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## 实例
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```bash
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ipcalc -p 192.168.2.1 255.255.255.0 # 输出：PREFIX=24
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ipcalc -n 192.168.2.1 255.255.255.0 # 输出：NETWORK=192.168.2.0
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ipcalc -h 127.0.0.1 # 输出：hostname=localhost.localdomain
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ipcalc -m 192.168.2.1 # 输出：NETMASK=255.255.255.0
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ipcalc -pnbm 192.168.2.1 255.255.255.0 # 输出以上四个选项所有
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```
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