Move pages under tldr, lint run.sh, update docs

tldr/salt

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# salt
+
+> Execute commands and assert state on remote salt minions.
+> More information: <https://docs.saltproject.io/en/latest/ref/cli/index.html>.
+
+- List connected minions:
+
+`salt '*' test.ping`
+
+- Execute a highstate on all connected minions:
+
+`salt '*' state.highstate`
+
+- Upgrade packages using the OS package manager (apt, yum, brew) on a subset of minions:
+
+`salt '*.example.com' pkg.upgrade`
+
+- Execute an arbitrary command on a particular minion:
+
+`salt '{{minion_id}}' cmd.run "ls "`