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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_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 occurances 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}}`