tldr/pages/common/tr.md

tr

Translate characters: run replacements based on single characters and character sets. More information: https://www.gnu.org/software/coreutils/manual/html_node/tr-invocation.html.

• 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}}