Update cheatsheets

linux/xvfb-run

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# xvfb-run
+
+> Run a command in a virtual X server environment.
+> More information: <https://www.x.org/wiki/>.
+
+- Run the specified command in a virtual X server:
+
+`xvfb-run {{command}}`
+
+- Try to get a free server number, if the default (99) is not available:
+
+`xvfb-run --auto-servernum {{command}}`
+
+- Pass arguments to the Xvfb server:
+
+`xvfb-run --server-args "{{-screen 0 1024x768x24}}" {{command}}`