A command-line tool for deduplicating entries in a file or stream with constant memory usage

Unit sort command-line utility with the ability to count unique entries inline. Also includes some cut features to handle fields.

a unix 'uniq' command with extra features like user-specified delimiters, select first of last line of a collated group, match on a field, and update counts within a previous uniq output.

A uniq for URL integrated with query string result.

simple double linked list implementation in C

WSU student code that does what the cat, sed, and uniq commands do

Operating systems programs for the xv6 operating system