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    <p>You can issue a <code>system()</code> command to your operating system:</p> <ul> <li>In Windows you can use <code>ipconfig</code></li> <li>In Linux, use <code>ifconfig</code></li> </ul> <p>For example, on Windows try calling <code>system()</code> with the argument <code>intern=TRUE</code> to return the results to R:</p> <pre><code>x &lt;- system("ipconfig", intern=TRUE) </code></pre> <p>This returns:</p> <pre><code>x [1] "" [2] "Windows IP Configuration" [3] "" [4] "" [5] "Wireless LAN adapter Wireless Network Connection:" [6] "" [7] " Connection-specific DNS Suffix . : tbglondon.local" [8] " Link-local IPv6 Address . . . . . : fe80::c0cb:e470:91c7:abb9%14" [9] " IPv4 Address. . . . . . . . . . . : 10.201.120.184" [10] " Subnet Mask . . . . . . . . . . . : 255.255.255.0" [11] " Default Gateway . . . . . . . . . : 10.201.120.253" [12] "" [13] "Ethernet adapter Local Area Connection:" [14] "" [15] " Connection-specific DNS Suffix . : tbglondon.local" [16] " Link-local IPv6 Address . . . . . : fe80::9d9b:c44c:fd4d:1c77%11" [17] " IPv4 Address. . . . . . . . . . . : 10.201.120.157" [18] " Subnet Mask . . . . . . . . . . . : 255.255.255.0" [19] " Default Gateway . . . . . . . . . : 10.201.120.253" [20] "" [21] "Tunnel adapter Local Area Connection* 13:" [22] "" [23] " Media State . . . . . . . . . . . : Media disconnected" [24] " Connection-specific DNS Suffix . : " [25] "" [26] "Tunnel adapter isatap.tbglondon.local:" [27] "" [28] " Media State . . . . . . . . . . . : Media disconnected" [29] " Connection-specific DNS Suffix . : tbglondon.local" [30] "" [31] "Tunnel adapter Teredo Tunneling Pseudo-Interface:" [32] "" [33] " Media State . . . . . . . . . . . : Media disconnected" [34] " Connection-specific DNS Suffix . : " </code></pre> <p>Now you can use <code>grep</code> to find the lines with <code>IPv4</code>:</p> <pre><code>x[grep("IPv4", x)] [1] " IPv4 Address. . . . . . . . . . . : 10.201.120.184" [2] " IPv4 Address. . . . . . . . . . . : 10.201.120.157" </code></pre> <p>And to extract just the ip address:</p> <pre><code>z &lt;- x[grep("IPv4", x)] gsub(".*? ([[:digit:]])", "\\1", z) "10.201.120.184" "10.201.120.157" </code></pre>
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    1. COand `ifconfing` under unix like system...
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    2. CO@agstudy Thank you. Answer edited
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    3. COthank you so much!
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