tldr/pages/common/tr.md

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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}}`
2017-05-12 10:29:18 +01:00
- 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}}`