ipcalc from home:Star2BarryN project

对于 15.7，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:Star2BarryN/15.7/home:Star2BarryN.repo
zypper refresh
zypper install ipcalc

对于 15.6，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:Star2BarryN/15.6/home:Star2BarryN.repo
zypper refresh
zypper install ipcalc

对于 openSUSE Leap 16.0，请以根用户 root 运行下面命令：

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