Added nmcli cheatsheet

cheat/cheatsheets/nmcli

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+# Desc: Command line interface to NetworkManager
+
+# Connect to a wireless access point - Parameters:
+# 	<wiface> -- the name of your wireless interface
+#	<ssid> -- the SSID of the access point
+#	<pass> -- the WiFi password
+nmcli d wifi connect <ssid> password <pass> iface <wiface>
+
+# Disconnect from WiFi - Parameters:
+#	<wiface> -- the name of your wireless interface
+nmcli d wifi disconnect iface <wiface>
+
+# Show all available connections
+nmcli con
+
+# Show only active connections
+nmcli con show --active
+
+# Review the available devices
+nmcli dev status
+
+# Add a dynamic ethernet connection - parameters:
+#	<name> -- the name of the connection
+#	<iface_name> -- the name of the interface
+ncmli con add type ethernet con-name <name> ifname <iface_name>
+
+# Bring up the ethernet connection
+nmcli con up <name>