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

tldr/uniq

@@ -0,0 +1,30 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# uniq
+
+> Output the unique lines from a input or file.
+> Since it does not detect repeated lines unless they are adjacent, we need to sort them first.
+> More information: <https://www.gnu.org/software/coreutils/uniq>.
+
+- Display each line once:
+
+`sort {{path/to/file}} | uniq`
+
+- Display only unique lines:
+
+`sort {{path/to/file}} | uniq -u`
+
+- Display only duplicate lines:
+
+`sort {{path/to/file}} | uniq -d`
+
+- Display number of occurrences of each line along with that line:
+
+`sort {{path/to/file}} | uniq -c`
+
+- Display number of occurrences of each line, sorted by the most frequent:
+
+`sort {{path/to/file}} | uniq -c | sort -nr`