Which command is a character based translator that can be used to replace one character or set of characters with another?
tr command
The tr command in UNIX is a command line utility for translating or deleting characters. It supports a range of transformations including uppercase to lowercase, squeezing repeating characters, deleting specific characters and basic find and replace.
How do you use tr in Shell?
tr stands for translate.
- Syntax. The syntax of tr command is: $ tr [OPTION] SET1 [SET2]
- Translation.
- Convert lower case to upper case.
- Translate braces into parenthesis.
- Translate white-space to tabs.
- Squeeze repetition of characters using -s.
- Delete specified characters using -d option.
- Complement the sets using -c option.
Is there a way to remove repeated characters in TR?
Using tr Command to Remove Repeated Characters (Squeeze) Another champion option of the tr command is -s (–squeeze-repeats). Squeeze means to take any number of repeated characters and replace then with a single instance of that character. This is often used to remove double spacing or excessive empty lines.
What is the syntax for the tr command?
The syntax for the tr command is as follows: tr OPTION… SET1 [SET2] tr accepts two sets of characters, usually with the same length, and replaces the characters of the first sets with the corresponding characters from the second set. A SET is basically a string of characters, including the special backslash-escaped characters.
Why is the L character not deleted in TR?
The L character is not deleted because the input includes an uppercase L while the l character in the SET is lowercase. The -s ( –squeeze-repeats) option replaces a sequence of repeated occurrences with the character set in the last SET. In the following example, tr removes the repeated space characters:
Can you replace one character with two characters?
Active Oldest Votes 36 No, tr is specifically intended to replace single characters by single characters (or, depending on command-line options, to delete characters or replace runs of a single character by one occurrence.). sed is probably the best tool for this particular job: