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- UNIQ(1L) UNIQ(1L)
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- NAME
- uniq - remove duplicate lines from a sorted file
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- SYNOPSIS
- uniq [-cdu] [-f skip-fields] [-s skip-chars] [-w check-
- chars] [-#skip-fields] [+#skip-chars] [--count]
- [--repeated] [--unique] [--skip-fields=skip-fields]
- [--skip-chars=skip-chars] [--check-chars=check-chars]
- [--help] [--version] [infile] [outfile]
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- DESCRIPTION
- This manual page documents the GNU version of uniq. uniq
- prints the unique lines in a sorted file, discarding all
- but one of a run of matching lines. It can optionally
- show only lines that appear exactly once, or lines that
- appear more than once. uniq requires sorted input because
- it compares only consecutive lines.
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- If the output file is not specified, uniq writes to the
- standard output. If the input file is not specified, it
- reads from the standard input.
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- OPTIONS
- -u, --unique
- Only print unique lines.
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- -d, --repeated
- Only print duplicate lines.
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- -c, --count
- Print the number of times each line occurred along
- with the line.
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- -number, -f, --skip-fields=number
- In this option, number is an integer representing
- the number of fields to skip over before checking
- for uniqueness. The first number fields, along
- with any blanks found before number fields is
- reached, are skipped over and not counted. Fields
- are defined as a strings of non-space, non-tab
- characters, that are separated from each other by
- spaces and tabs.
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- +number, -s, --skip-chars=number
- In this option, number is an integer representing
- the number of characters to skip over before check-
- ing for uniqueness. The first number characters,
- along with any blanks found before number charac-
- ters is reached, are skipped over and not counted.
- If you use both the field and character skipping
- options, fields are skipped over first.
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- -w, --check-chars=number
- Specify the number of characters to compare in the
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- FSF GNU Text Utilities 1
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- UNIQ(1L) UNIQ(1L)
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- lines, after skipping any specified fields and
- characters. Normally the entire rest of the lines
- are compared.
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- --help Print a usage message and exit with a non-zero sta-
- tus.
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- --version
- Print version information on standard error then
- exit.
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- FSF GNU Text Utilities 2
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