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

tldr/linux/xxhsum

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# xxhsum
+
+> Print or verify checksums using fast non-cryptographic algorithm xxHash.
+> More information: <https://github.com/Cyan4973/xxHash>.
+
+- Calculate the checksum for a file using a specific algorithm:
+
+`xxhsum -H{{0|32|64|128}} {{path/to/file}}`
+
+- Run benchmark:
+
+`xxhsum -b`