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 NAME     
 |  |  |  | tr – translate characters 
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 SYNOPSIS     
 |  |  |  | tr [ −cds ] [ string1 [ string2 ] ] 
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 DESCRIPTION     
 |  |  |  | Tr copies the standard input to the standard output with substitution
    or deletion of selected characters (runes). Input characters found
    in string1 are mapped into the corresponding characters of string2.
    When string2 is short it is padded to the length of string1 by
    duplicating its last character. Any combination of the options
    −cds may be used:
    −c    Complement string1: replace it with a lexicographically ordered
    list of all other characters. −d    Delete from input all characters in string1.
 −s    Squeeze repeated output characters that occur in string2 to
    single characters. 
    
    
    In either string a noninitial sequence −x, where x is any character
    (possibly quoted), stands for a range of characters: a possibly
    empty sequence of codes running from the successor of the previous
    code up through the code for x. The character \ followed by 1,
    2 or 3 octal digits stands for the character whose 16-bit value
    is given by those digits. The
    character sequence \x followed by 1, 2, 3, or 4 hexadecimal digits
    stands for the character whose 16-bit value is given by those
    digits. A \ followed by any other character stands for that character.
 
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 EXAMPLES     
 |  |  |  | Replace all upper-case ASCII letters by lower-case. Create a list of all the words in file1 one per line in file2,
    where a word is taken to be a maximal string of alphabetics. String2
    is given as a quoted newline.
 
 |  |  |  | tr −cs A−Za−z ' ' <file1 >file2
 
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 SOURCE     
 SEE ALSO     
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