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#top tr

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tr - translate or delete characters

Powiązane:
cat, grep, head, sed, sort, tail, tr, uniq, wc,

#top SYNOPSIS

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


#top DESCRIPTION

DESCRIPTION



#top OPTIONS

OPTIONS
Translate, squeeze, and/or delete characters from standard input, writing to standard output.

-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.



#top EXAMPLES

EXAMPLES
Line Feed is char 0x000A
Carriage Return is char 0x000D
remove Carriage Return \r (0x0D=\015)
cat file | tr  -d '\015'

remove Line Feed \n (0x0A=\012)
cat file | tr  -d '\012'

convert BIG LETTERS into lower letters and vice versa
echo 'BIG LETTERS' | tr '[:upper:]' '[:lower:]'
echo 'lower letters' | tr '[:lower:]' '[:upper:]'



Zmodyfikowany ostatnio: 2014/07/09 18:31:00 (10 lat temu), textsize: 4,19 kB, htmlsize: 7,40 kB
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