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+N same as -s N (obsolescent; will be withdrawn)
--help display this help and exit
--version
output version information and exit
A field is a run of whitespace, then non-whitespace char
acters. Fields are skipped before chars.
AUTHOR
Written by Richard Stallman and David MacKenzie.
REPORTING BUGS
Report bugs to <bug-textutils@gnu.org>.
Copyright © 2001 Free Software Foundation, Inc.
This is free software; see the source for copying condi
tions. There is NO warranty; not even for MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
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.
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