# tr > Translate characters: run replacements based on single characters and character sets. > More information: . - Replace all occurrences of a character in a file, and print the result: `tr {{find_character}} {{replace_character}} < {{path/to/file}}` - 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}}' < {{path/to/file}}` - Delete all occurrences of the specified set of characters from the input: `tr -d '{{input_characters}}' < {{path/to/file}}` - Compress a series of identical characters to a single character: `tr -s '{{input_characters}}' < {{path/to/file}}` - Translate the contents of a file to upper-case: `tr "[:lower:]" "[:upper:]" < {{path/to/file}}` - Strip out non-printable characters from a file: `tr -cd "[:print:]" < {{path/to/file}}`