Update cheatsheets

linux/whatis

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# whatis
+
+> Display one-line descriptions from manual pages.
+> More information: <https://manned.org/whatis>.
+
+- Display a description from a man page:
+
+`whatis {{command}}`
+
+- Don't cut the description off at the end of the line:
+
+`whatis --long {{command}}`
+
+- Display descriptions for all commands matching a glob:
+
+`whatis --wildcard {{net*}}`
+
+- Search man page descriptions with a regular expression:
+
+`whatis --regex '{{wish[0-9]\.[0-9]}}'`
+
+- Display descriptions in a specific language:
+
+`whatis --locale={{en}} {{command}}`