Section (1) tr
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.
−c
,−C
,−−complement
-
use the complement of SET1
−d
,−−delete
-
delete characters in SET1, do not translate
−s
,−−squeeze−repeats
-
replace each sequence of a repeated character that is listed in the last specified SET, 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
-
backspace
- f
-
form feed
-
new line
-
return
-
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 the last specified
SET, and occurs after translation or deletion.
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/tr>
or available locally via: info _zsingle_quotesz_(coreutils) tr invocation_zsingle_quotesz_
COPYRIGHT |
---|
Copyright © 2019 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. |