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

tldr/whereis

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# whereis
+
+> Locate the binary, source, and manual page files for a command.
+> More information: <https://manned.org/whereis>.
+
+- Locate binary, source and man pages for ssh:
+
+`whereis {{ssh}}`
+
+- Locate binary and man pages for ls:
+
+`whereis -bm {{ls}}`
+
+- Locate source of gcc and man pages for Git:
+
+`whereis -s {{gcc}} -m {{git}}`
+
+- Locate binaries for gcc in `/usr/bin/` only:
+
+`whereis -b -B {{/usr/bin/}} -f {{gcc}}`
+
+- Locate unusual binaries (those that have more or less than one binary on the system):
+
+`whereis -u *`
+
+- Locate binaries that have unusual manual entries (binaries that have more or less than one manual installed):
+
+`whereis -u -m *`