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tr(1) - tr, tr - translate or delete characters - man 1 tr

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TR(1)                            User Commands                           TR(1)



NAME
       tr - translate or delete characters

SYNOPSIS
       tr [OPTION]... SET1 [SET2]

DESCRIPTION
       Translate, squeeze, and/or delete characters from standard input, writ-
       ing to standard output.

       -c, --complement
              first complement SET1

       -d, --delete
              delete characters in(1,8) SET1, do not translate

       -s, --squeeze-repeats
              replace each input sequence of  a  repeated  character  that  is
              listed in(1,8) SET1 with a single occurrence of that character

       -t, --truncate-set1
              first truncate(2,7) SET1 to length of SET2

       --help display this help and exit(3,n,1 builtins)

       --version
              output version(1,3,5) information and exit(3,n,1 builtins)

       SETs  are  specified  as  strings  of characters.  Most represent them-
       selves.  Interpreted sequences are:

       \NNN   character with octal value NNN (1 to 3 octal digits)

       \\     backslash

       \a     audible BEL

       \b     backspace

       \f     form feed

       \n     new line

       \r     return

       \t     horizontal tab

       \v     vertical tab

       CHAR1-CHAR2
              all characters from CHAR1 to CHAR2 in(1,8) ascending order

       [CHAR*]
              in(1,8) SET2, copies of CHAR until length of SET1

       [CHAR*REPEAT]
              REPEAT copies of CHAR, REPEAT octal if(3,n) starting with 0

       [:alnum:]
              all letters and digits

       [:alpha:]
              all letters

       [:blank:]
              all horizontal whitespace

       [:cntrl:]
              all control characters

       [:digit:]
              all digits

       [:graph:]
              all printable characters, not including space

       [:lower:]
              all lower case letters

       [:print:]
              all printable characters, including space

       [:punct:]
              all punctuation characters

       [:space:]
              all horizontal or vertical whitespace

       [:upper:]
              all upper case letters

       [:xdigit:]
              all hexadecimal digits

       [=CHAR=]
              all characters which are equivalent to CHAR

       Translation occurs if(3,n) -d is not given and both SET1  and  SET2  appear.
       -t  may  be  used only when translating.  SET2 is extended to length of
       SET1 by repeating its last character as necessary.   Excess  characters
       of  SET2  are  ignored.  Only [:lower:] and [:upper:] are guaranteed to
       expand in(1,8) ascending order; used in(1,8) SET2  while  translating,  they  may
       only  be used in(1,8) pairs to specify case conversion.  -s uses SET1 if(3,n) not
       translating nor deleting; else squeezing uses  SET2  and  occurs  after
       translation or deletion.

AUTHOR
       Written by Jim Meyering.

REPORTING BUGS
       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT
       Copyright  2004 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is
       NO warranty; not even for MERCHANTABILITY or FITNESS FOR  A  PARTICULAR
       PURPOSE.

SEE ALSO
       The  full  documentation  for tr is maintained as a Texinfo manual.  If
       the info(1,5,n) and tr programs are properly installed at your site, the  com-
       mand

              info(1,5,n) coreutils tr

       should give you access(2,5) to the complete manual.



tr (coreutils) 5.2.1              March 2004                             TR(1)

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