misc-utils/look.1.adoc

   1 //po4a: entry man manual
   2 ////
   3 Copyright (c) 1990, 1993
   4         The Regents of the University of California.  All rights reserved.
   5
   6 Redistribution and use in source and binary forms, with or without
   7 modification, are permitted provided that the following conditions
   8 are met:
   9 1. Redistributions of source code must retain the above copyright
  10    notice, this list of conditions and the following disclaimer.
  11 2. Redistributions in binary form must reproduce the above copyright
  12    notice, this list of conditions and the following disclaimer in the
  13    documentation and/or other materials provided with the distribution.
  14 3. All advertising materials mentioning features or use of this software
  15    must display the following acknowledgement:
  16         This product includes software developed by the University of
  17         California, Berkeley and its contributors.
  18 4. Neither the name of the University nor the names of its contributors
  19    may be used to endorse or promote products derived from this software
  20    without specific prior written permission.
  21
  22 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25 ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32 SUCH DAMAGE.
  33
  34     @(#)look.1  8.1 (Berkeley) 6/14/93
  35 ////
  36 = look(1)
  37 :doctype: manpage
  38 :man manual: User Commands
  39 :man source: util-linux {release-version}
  40 :page-layout: base
  41 :command: look
  42
  43 == NAME
  44
  45 look - display lines beginning with a given string
  46
  47 == SYNOPSIS
  48
  49 *look* [options] _string_ [_file_]
  50
  51 == DESCRIPTION
  52
  53 The *look* utility displays any lines in _file_ which contain _string_ as a prefix. As *look* performs a binary search, the lines in _file_ must be sorted (where *sort*(1) was given the same options *-d* and/or *-f* that *look* is invoked with).
  54
  55 If _file_ is not specified, the file _/usr/share/dict/words_ is used, only alphanumeric characters are compared and the case of alphabetic characters is ignored.
  56
  57 == OPTIONS
  58
  59 *-a*, *--alternative*::
  60 Use the alternative dictionary file.
  61
  62 *-d*, *--alphanum*::
  63 Use normal dictionary character set and order, i.e., only blanks and alphanumeric characters are compared. This is on by default if no file is specified.
  64 +
  65 Note that blanks have been added to dictionary character set for compatibility with *sort -d* command since version 2.28.
  66
  67 *-f*, *--ignore-case*::
  68 Ignore the case of alphabetic characters. This is on by default if no file is specified.
  69
  70 *-t*, *--terminate* _character_::
  71 Specify a string termination character, i.e., only the characters in _string_ up to and including the first occurrence of _character_ are compared.
  72
  73 include::man-common/help-version.adoc[]
  74
  75 The *look* utility exits 0 if one or more lines were found and displayed, 1 if no lines were found, and >1 if an error occurred.
  76
  77 == ENVIRONMENT
  78
  79 *WORDLIST*::
  80 Path to a dictionary file. The environment variable has greater priority than the dictionary path defined in the *FILES* segment.
  81
  82 == FILES
  83
  84 _/usr/share/dict/words_::
  85 the dictionary
  86
  87 _/usr/share/dict/web2_::
  88 the alternative dictionary
  89
  90 == HISTORY
  91
  92 The *look* utility appeared in Version 7 AT&T Unix.
  93
  94 == EXAMPLES
  95
  96 ....
  97 sort -d /etc/passwd -o /tmp/look.dict
  98 look -t: root:foobar /tmp/look.dict
  99 ....
 100
 101 == SEE ALSO
 102
 103 *grep*(1),
 104 *sort*(1)
 105
 106 include::man-common/bugreports.adoc[]
 107
 108 include::man-common/footer.adoc[]
 109
 110 ifdef::translation[]
 111 include::man-common/translation.adoc[]
 112 endif::[]