add page: az sshkey (#8603)

pages/common/az-sshkey.md

@@ -0,0 +1,21 @@
+# az sshkey
+
+> Manage ssh public key with vm.
+> Part of `azure-cli`.
+> More information: <https://docs.microsoft.com/cli/azure/sshkey>.
+
+- Create a new SSH key:
+
+`az sshkey create --name {{name}} --resource-group {{resource_group}}`
+
+- Upload an existing SSH key:
+
+`az sshkey create --name {{name}} --resource-group {{resource_group}} --public-key "{{@path/to/key.pub}}"`
+
+- List all SSH public keys:
+
+`az sshkey list`
+
+- Show information about an SSH public key:
+
+`az sshkey show --name {{name}} --resource-group {{resource_group}}`