tr-translates characters

tr ” translates characters

 tr [ cds ] [ string1 [ string2 ] ] 

tr copies the standard input to the standard output with substitution or deletion of selected characters. Input characters found in string1 are mapped into the corresponding characters of string2 . The forward slash can be used with an octal digit to represent the ASCII code. When string2 (with any repetitions of characters) contains fewer characters than string1 , characters in string1 with no corresponding character in string2 are not translated. Octal values for characters may be used when preceded with a backslash:

\11	Tab
\12	Newline
\042	Single quote
\047	Double quote

Example A.63.

 1   tr 'A' 'B' < filex 2   tr '[A-Z]' [a-z]' < filex 3   tr -d ' ' < filex 4   tr -s '' '' < filex 5   tr -s ':' ' ' < filex 6   tr '7' '2' 

EXPLANATION

1. Translates As to Bs in filex .

2. Translates all uppercase letters to lowercase letters .

3. Deletes all spaces from filex .

4. Replaces (squeezes) multiple tabs with single tabs in filex .

5. Squeezes multiple colons into single spaces in filex .

6. Translates double quotes to single quotes in text coming from standard input.