nmcli: add more server examples (#3816)

pages/linux/nmcli-connection.md

@@ -0,0 +1,27 @@
+# nmcli connection
+
+> Connection management with NetworkManager.
+
+- List all NetworkManager connections (shows name, uuid, type and device):
+
+`nmcli connection`
+
+- Activate a connection by specifying an uuid:
+
+`nmcli connection up uuid {{uuid}}`
+
+- Deactivate a connection:
+
+`nmcli connection down uuid {{uuid}}`
+
+- Create an auto-configured dual stack connection:
+
+`nmcli connection add ifname {{interface_name}} type {{ethernet}} ipv4.method {{auto}} ipv6.method {{auto}}`
+
+- Create a static IPv6-only connection:
+
+`nmcli connection add ifname {{interface_name}} type {{ethernet}} ip6 {{2001:db8::2/64}} gw6 {{2001:db8::1}} ipv6.dns {{2001:db8::1}} ipv4.method {{ignore}}`
+
+- Create a static IPv4-only connection:
+
+`nmcli connection add ifname {{interface_name}} type {{ethernet}} ip4 {{10.0.0.7/8}} gw4 {{10.0.0.1}} ipv4.dns {{10.0.0.1}} ipv6.method {{ignore}}`