Update cheatsheets

ifdata

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ifdata
+
+> Display information about a network interface.
+> More information: <https://joeyh.name/code/moreutils/>.
+
+- Display the whole configuration of the specified interface:
+
+`ifdata -p {{eth0}}`
+
+- Indicate the [e]xistence of the specified interface via the exit code:
+
+`ifdata -e {{eth0}}`
+
+- Display the IPv4 [a]dress and the [n]etmask of the specified interface:
+
+`ifdata -pa -pn {{eth0}}`
+
+- Display the [N]etwork adress, the [b]roadcast adress, and the MTU of the specified interface:
+
+`ifdata -pN -pb -pm {{eth0}}`
+
+- Display help:
+
+`ifdata`