Update cheatsheets

tldr/linux/lvscan

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lvscan
+
+> Scan (list) all logical volumes in the system.
+> Part of the LVM (Logical Volume Manager) suite.
+> More information: <https://manned.org/lvscan>.
+
+- List all logical volumes:
+
+`lvscan`
+
+- List only active logical volumes:
+
+`lvscan --active`
+
+- List only inactive logical volumes:
+
+`lvscan --inactive`
+
+- Display logical volumes in JSON format:
+
+`lvscan --reportformat json`

tldr/linux/xdp-filter

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# xdp-filter
+
+> Load and manage an eBPF XDP packet filter.
+> Part of the xdp-tools collection.
+> More information: <https://github.com/xdp-project/xdp-tools/tree/main/xdp-filter#running-xdp-filter>.
+
+- Load the filter on an interface in skb (generic) mode with default allow policy:
+
+`sudo xdp-filter load {{[-p|--policy]}} allow {{[-m|--mode]}} skb {{network_interface}}`
+
+- Unload the filter from an interface:
+
+`sudo xdp-filter unload {{network_interface}}`
+
+- Deny traffic to a specific destination port:
+
+`sudo xdp-filter port {{destination_port}}`
+
+- Deny traffic from a specific source IP address:
+
+`sudo xdp-filter ip {{[-m|--mode]}} src {{source_ip}}`
+
+- Deny traffic from a specific source MAC address:
+
+`sudo xdp-filter ether {{[-m|--mode]}} src {{mac_address}}`
+
+- Poll packets and show statistics every 10000 milliseconds:
+
+`sudo xdp-filter poll {{[-i|--interval]}} 10000`