Update cheatsheets

linux/iptables-save

@@ -0,0 +1,22 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# iptables-save
+
+> Save the `iptables` IPv4 configuration.
+> Use `ip6tables-save` to to the same for IPv6.
+> More information: <https://manned.org/iptables-save>.
+
+- Print the `iptables` configuration:
+
+`sudo iptables-save`
+
+- Print the `iptables` configuration of a specific [t]able:
+
+`sudo iptables-save --table {{table}}`
+
+- Save the `iptables` configuration to a [f]ile:
+
+`sudo iptables-save --file {{path/to/file}}`