Update cheatsheets

tldr/linux/secon

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# secon
+
+> Get the SELinux security context of a file, pid, current execution context, or a context specification.
+> See also: `semanage`, `runcon`, `chcon`.
+> More information: <https://manned.org/man/secon>.
+
+- Get the security context of the current execution context:
+
+`secon`
+
+- Get the current security context of a process:
+
+`secon --pid {{1}}`
+
+- Get the current security context of a file, resolving all intermediate symlinks:
+
+`secon --file {{path/to/file_or_directory}}`
+
+- Get the current security context of a symlink itself (i.e. do not resolve):
+
+`secon --link {{path/to/symlink}}`
+
+- Parse and explain a context specification:
+
+`secon {{system_u:system_r:container_t:s0:c899,c900}}`