ipcalc: add page

pages/linux/ipcalc.md

@@ -0,0 +1,23 @@
+# ipcalc
+
+> Perform simple operations/calculations on IP addresses and networks.
+
+- Show information about an address/network:
+
+`ipcalc {{ip_address}} {{subnet_mask}}`
+
+- Show information about an address/network in CIDR notation:
+
+`ipcalc {{ip_address}}/{{masked_bits}}`
+
+- Show broadcast address of an address/network:
+
+`ipcalc -b {{ip_address}}/{{masked_bits}}`
+
+- Show network address of provided IP address and netmask:
+
+`ipcalc -n {{ip_address}}/{{masked_bits}}`
+
+- Display geographic information of provided IP address:
+
+`ipcalc -g {{ip_address}}`