tr

tr [OPTION]... SET1 [SET2]

Translate or delete characters

Options

--complement, -c, -C

use the complement of SET1

--delete, -d

delete characters in SET1, do not translate

--squeeze-repeats, -s

replace each sequence of a repeated character that is listed in the last specified SET, with a single occurrence of that character

--truncate-set1, -t

first truncate SET1 to length of SET2

Translate, squeeze, and/or delete characters from standard input, writing to standard output.

Examples

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}}

The examples are provided by the tldr-pages project under the CC BY 4.0 License.

Please note that, as uutils is a work in progress, some examples might fail.