Update cheatsheets

linux/equery

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# equery
+
+> View information about Portage packages.
+> More information: <https://wiki.gentoo.org/wiki/Equery>.
+
+- List all installed packages:
+
+`equery list '*'`
+
+- Search for installed packages in the Portage tree and in overlays:
+
+`equery list -po {{package1 package2 ...}}`
+
+- List all packages that depend on a given package:
+
+`equery depends {{package}}`
+
+- List all packages that a given package depends on:
+
+`equery depgraph {{package}}`
+
+- List all files installed by a package:
+
+`equery files --tree {{package}}`