tr - Unix, Linux Command
NAME
tr - translate or delete characters
SYNOPSIS
tr [
OPTION]...
SET1 [
SET2]
DESCRIPTION
Translate, squeeze, and/or delete characters from standard input,
writing to standard output.
Tag | Description |
-c, -C, --complement
|
|
first complement SET1
|
-d, --delete
|
|
delete characters in SET1, do not translate
|
-s, --squeeze-repeats
|
|
replace each input sequence of a repeated character
that is listed in SET1 with a single occurrence
of that character
|
-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 represent themselves.
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 ascending order
|
[CHAR*]
|
|
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 character 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 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 © 2006 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <
http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
tr is maintained as a Texinfo manual. If the
info and
tr programs are properly installed at your site, the command
should give you access to the complete manual.
|