1TR(1)                            User Commands                           TR(1)
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NAME

6       tr - translate or delete characters
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SYNOPSIS

9       tr [OPTION]... SET1 [SET2]
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DESCRIPTION

12       Translate, squeeze, and/or delete characters from standard input, writ‐
13       ing to standard output.
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15       -c, -C, --complement
16              first complement SET1
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18       -d, --delete
19              delete characters in SET1, do not translate
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21       -s, --squeeze-repeats
22              replace each input sequence of  a  repeated  character  that  is
23              listed in SET1 with a single occurrence of that character
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25       -t, --truncate-set1
26              first truncate SET1 to length of SET2
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28       --help display this help and exit
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30       --version
31              output version information and exit
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33       SETs  are  specified  as  strings  of characters.  Most represent them‐
34       selves.  Interpreted sequences are:
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36       \NNN   character with octal value NNN (1 to 3 octal digits)
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38       \\     backslash
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40       \a     audible BEL
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42       \b     backspace
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44       \f     form feed
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46       \n     new line
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48       \r     return
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50       \t     horizontal tab
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52       \v     vertical tab
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54       CHAR1-CHAR2
55              all characters from CHAR1 to CHAR2 in ascending order
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57       [CHAR*]
58              in SET2, copies of CHAR until length of SET1
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60       [CHAR*REPEAT]
61              REPEAT copies of CHAR, REPEAT octal if starting with 0
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63       [:alnum:]
64              all letters and digits
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66       [:alpha:]
67              all letters
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69       [:blank:]
70              all horizontal whitespace
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72       [:cntrl:]
73              all control characters
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75       [:digit:]
76              all digits
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78       [:graph:]
79              all printable characters, not including space
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81       [:lower:]
82              all lower case letters
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84       [:print:]
85              all printable characters, including space
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87       [:punct:]
88              all punctuation characters
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90       [:space:]
91              all horizontal or vertical whitespace
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93       [:upper:]
94              all upper case letters
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96       [:xdigit:]
97              all hexadecimal digits
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99       [=CHAR=]
100              all characters which are equivalent to CHAR
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102       Translation occurs if -d is not given and both SET1  and  SET2  appear.
103       -t  may  be  used only when translating.  SET2 is extended to length of
104       SET1 by repeating its last character as necessary.   Excess  characters
105       of  SET2  are  ignored.  Only [:lower:] and [:upper:] are guaranteed to
106       expand in ascending order; used in SET2  while  translating,  they  may
107       only  be used in pairs to specify case conversion.  -s uses SET1 if not
108       translating nor deleting; else squeezing uses  SET2  and  occurs  after
109       translation or deletion.
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AUTHOR

112       Written by Jim Meyering.
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REPORTING BUGS

115       Report bugs to <bug-coreutils@gnu.org>.
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118       Copyright © 2007 Free Software Foundation, Inc.
119       This  is  free  software.   You may redistribute copies of it under the
120       terms      of      the      GNU      General       Public       License
121       <http://www.gnu.org/licenses/gpl.html>.   There  is NO WARRANTY, to the
122       extent permitted by law.
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SEE ALSO

125       The full documentation for tr is maintained as a  Texinfo  manual.   If
126       the  info and tr programs are properly installed at your site, the com‐
127       mand
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129              info tr
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131       should give you access to the complete manual.
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135GNU coreutils 6.9                 March 2008                             TR(1)
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