UNIQ(1) User Commands UNIQ(1) NAME uniq - report or omit repeated lines SYNOPSIS uniq [OPTION]... [INPUT [OUTPUT]] DESCRIPTION Discard all but one of successive identical lines from INPUT (or stan dard input), writing to OUTPUT (or standard output). Mandatory arguments to long options are mandatory for short options too. -c, --count prefix lines by the number of occurrences -d, --repeated only print duplicate lines -D, --all-repeated[=delimit-method] print all duplicate lines delimit-method={none(default),prepend,separate} Delimiting is done with blank lines. -f, --skip-fields=N avoid comparing the first N fields -i, --ignore-case ignore differences in case when comparing -s, --skip-chars=N avoid comparing the first N characters -u, --unique only print unique lines -z, --zero-terminated end lines with 0 byte, not newline -w, --check-chars=N compare no more than N characters in lines --help display this help and exit --version output version information and exit A field is a run of whitespace, then non-whitespace characters. Fields are skipped before chars. Note: uniq does not detect repeated lines unless they are adjacent. You may want to sort the input first, or use sort -u without uniq. AUTHOR Written by Richard Stallman and David MacKenzie. REPORTING BUGS Report bugs to . COPYRIGHT Copyright 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO The full documentation for uniq is maintained as a Texinfo manual. If the info and uniq programs are properly installed at your site, the command info uniq should give you access to the complete manual. GNU coreutils 6.9.92.4-f088d-dirtJanuary 2008 UNIQ(1)