tldr/pages/common/tr.md

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_characters}} {{replace_characters}} < {{filename}}

• 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}}'

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

tr -s '\n'

• Translate the contents of the file to upper-case and print result:

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

• Strip out non-printable characters from the file and print result:

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