Update cheatsheets

linux/pkcon

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pkcon
+
+> Command line client for PackageKit console program used by Discover and Gnome software and alternative to 'apt'.
+> More information: <https://manned.org/pkcon>.
+
+- Install a package:
+
+`pkcon install {{package}}`
+
+- Remove a package:
+
+`pkcon remove {{package}}`
+
+- Refresh the package cache:
+
+`pkcon refresh`
+
+- Update packages:
+
+`pkcon update`
+
+- Search for a specific package:
+
+`pkcon search {{package}}`
+
+- List all available packages:
+
+`pkcon get-packages`