Update cheatsheets

linux/vgscan

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# vgscan
+
+> Scan for volume groups on all supported Logical Volume Manager (LVM) block devices.
+> See also: `lvm` and `vgchange`.
+> More information: <https://manned.org/vgscan>.
+
+- Scan for volume groups and print information about each group found:
+
+`sudo vgscan`
+
+- Scan for volume groups and add the special files in `/dev`, if they don't already exist, needed to access the logical volumes in the found groups:
+
+`sudo vgscan --mknodes`