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

tldr/linux/head

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# head
+
+> Output the first part of files.
+> More information: <https://www.gnu.org/software/coreutils/head>.
+
+- Output the first few lines of a file:
+
+`head --lines {{count}} {{path/to/file}}`
+
+- Output the first few bytes of a file:
+
+`head --bytes {{count}} {{path/to/file}}`
+
+- Output everything but the last few lines of a file:
+
+`head --lines -{{count}} {{path/to/file}}`
+
+- Output everything but the last few bytes of a file:
+
+`head --bytes -{{count}} {{path/to/file}}`