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Name

uniq - remove duplicate lines from a sorted file

Synopsis

uniq [OPTION]... [INPUT [OUTPUT]]

Description

Discard all but one of successive identical lines from INPUT (or standard input), writing to OUTPUT (or standard output).

-c, --count
prefix lines by the number of occurrences
-d, --repeated
only print duplicate lines
-D, --all-repeated
print all duplicate 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
-w, --check-chars=N
compare no more than N characters in lines
-N
same as -f N
+N
same as -s N
--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.

Reporting Bugs

Report bugs to <bug-textutils@gnu.org>.

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.

Copyright

Copyright © 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


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