Update cheatsheets

tldr/linux/lxc-create

@@ -10,12 +10,12 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Create a container interactively in `/var/lib/lxc/`:
 
-`lxc-create --name {{container}} --template download`
+`sudo lxc-create --name {{container}} --template download`
 
 - Create a container in a target directory:
 
-`lxc-create --lxcpath {{/path/to/directory/}} --name {{container}} --template download`
+`sudo lxc-create --lxcpath {{/path/to/directory/}} --name {{container}} --template download`
 
 - Create a container passing options to a template:
 
-`lxc-create --name {{name}} --template download -- --dist {{distro-name}} --release {{release-version}} --arch {{arch}}`
+`sudo lxc-create --name {{name}} --template download -- --dist {{distro-name}} --release {{release-version}} --arch {{arch}}`

tldr/linux/mangohud

@@ -0,0 +1,13 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mangohud
+
+> Display a monitoring HUD on top of a Vulkan or OpenGL graphical application.
+> More information: <https://github.com/flightlessmango/MangoHud>.
+
+- Use `mangohud` on top of an application:
+
+`mangohud {{command}}`