ipcalc: add page (#16132)

Author: Alex-Gekas

pages/common/ipcalc.md

@@ -0,0 +1,24 @@
+# ipcalc
+
+> A tool to calculate IP information (subnet, broadcast, host range) from an IP address and netmask.
+> More information: <https://manned.org/ipcalc>.
+
+- Display network info for an IP address:
+
+`ipcalc {{192.168.0.1}}`
+
+- Display network info using CIDR notation:
+
+`ipcalc {{192.168.0.1/24}}`
+
+- Display network info using a separate netmask:
+
+`ipcalc {{192.168.0.1}} {{255.255.255.0}}`
+
+- Show only CIDR notation output:
+
+`ipcalc {{[-c|--class]}} {{192.168.0.1/24}}`
+
+- Show version information:
+
+`ipcalc --version`