Add uniq command content

uniq documentation

content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/125-uniq.md

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-# Uniq
+# uniq
+
+The uniq utility reads the specified input_file comparing adjacent lines, and writes a copy of each unique input line to the output_file.
+
+See `man uniq` for further information.
+
+<BadgeLink badgeText='Cheat Sheet' colorScheme='blue' href='https://www.geeksforgeeks.org/uniq-command-in-linux-with-examples/'>uniq Cheat Sheet</BadgeLink>
+<BadgeLink badgeText='Documentation' colorScheme='blue' href='https://man7.org/linux/man-pages/man1/uniq.1.html'>uniq Documentation</BadgeLink>