tr - translate or delete characters
SYNOPSIS
tr [OPTION]... SET1 [SET2]
DESCRIPTION
Translate, squeeze, and/or delete characters from standard
input, writing to standard output.
-c, --complement
first complement SET1
-d, --delete
delete characters in SET1, do not translate
-s, --squeeze-repeats
replace sequence of characters with one
-t, --truncate-set1
first truncate SET1 to length of SET2
--help display this help and exit
--version
output version information and exit
SETs are specified as strings of characters. Most repre
sent themselves. Interpreted sequences are:
\NNN character with octal value NNN (1 to 3 octal dig
its)
\\ 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 ascending
order
in SET2, copies of CHAR until length of SET1
[CHAR*REPEAT]
REPEAT copies of CHAR, REPEAT octal if 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 -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 char
acter as necessary. Excess characters of SET2 are
ignored. Only [:lower:] and [:upper:] are guaranteed to
expand in ascending order; used in SET2 while translating,
they may only be used in pairs to specify case conversion.
-s uses SET1 if not translating nor deleting; else
tion.
AUTHOR
Written by Jim Meyering.
REPORTING BUGS
Report bugs to <bug-textutils@gnu.org>.
COPYRIGHT
Copyright © 2001 Free Software Foundation, Inc.
This is free software; see the source for copying condi
tions. 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 and tr programs are properly
installed at your site, the command
info tr
should give you access to the complete manual.
Man(1) output converted with
man2html