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tldr/pages/common/tr.md
Waldir Pimenta 2ac2881390 tr: improve page 
- Add source data to all examples
- Add an example for piping from another command
- Improve punctuation in main description
- Add token markup {{}} to one example that was missing it
- Remove redundant "and print result" from the last two examples
  (it's true for all the ones shown)
2019-01-15 20:14:34 +05:30

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tr

Translate characters: run replacements based on single characters and character sets.

  • Replace all occurrences of a character in a file, and print the result:

tr {{find_character}} {{replace_character}} < {{filename}}

  • Replace all occurrences of a character from another command's output:

echo {{text}} | tr {{find_character}} {{replace_character}}

  • Map each character of the first set to the corresponding character of the second set:

tr '{{abcd}}' '{{jkmn}}' < {{filename}}

  • Delete all occurrences of the specified set of characters from the input:

tr -d '{{input_characters}}' < {{filename}}

  • Compress a series of identical characters to a single character:

tr -s '{{input_characters}}' < {{filename}}

  • Translate the contents of a file to upper-case:

tr "[:lower:]" "[:upper:]" < {{filename}}

  • Strip out non-printable characters from a file:

tr -cd "[:print:]" < {{filename}}