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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] [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
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- -_✓u, +_✓u_✓n_✓i_✓q_✓u_✓e
- Only print unique lines.
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- -_✓d, +_✓r_✓e_✓p_✓e_✓a_✓t_✓e_✓d
- Only print duplicate lines.
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- -_✓c, +_✓c_✓o_✓u_✓n_✓t
- Print the number of times each line occurred along with
- the line.
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- -, -_✓f, +_✓s_✓k_✓i_✓p-_✓f_✓i_✓e_✓l_✓d_✓s=_✓n_✓u_✓m_✓b_✓e_✓r
- In this option, _✓n_✓u_✓m_✓b_✓e_✓r is an integer representing the
- number of fields to skip over before checking for
- uniqueness. The first _✓n_✓u_✓m_✓b_✓e_✓r fields, along with any
- blanks found before _✓n_✓u_✓m_✓b_✓e_✓r 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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- +, -_✓s, +_✓s_✓k_✓i_✓p-_✓c_✓h_✓a_✓r_✓s=_✓n_✓u_✓m_✓b_✓e_✓r
- In this option, _✓n_✓u_✓m_✓b_✓e_✓r is an integer represent the
- number of characters to skip over before checking for
- uniqueness. The first _✓n_✓u_✓m_✓b_✓e_✓r characters, along with
- any blanks found before _✓n_✓u_✓m_✓b_✓e_✓r characters 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, +_✓c_✓h_✓e_✓c_✓k-_✓c_✓h_✓a_✓r_✓s=_✓n_✓u_✓m_✓b_✓e_✓r
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- Page 1
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- UNIQ(1L) UNIQ(1L)
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- Specify the number of characters to compare in the
- lines, after skipping any specified fields and charac-
- ters. Normally the entire rest of the lines are com-
- pared.
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- Page 2
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