The tr command¶

The tr command in UNIX is a command line utility for translating or deleting characters. It supports a range of transformations including uppercase to lowercase, squeezing repeating characters, deleting specific characters and basic find and replace. It can be used with UNIX pipes to support more complex translation. tr stands for translate.

Examples:¶

1. Convert all lowercase letters in file1 to uppercase.

$ cat file1 foo bar baz tr a-z A-Z < file1 FOO BAR BAZ

1. Make consecutive line breaks into one.

``` $ cat file1 foo

bar

baz $ tr -s "n" < file1 foo bar baz ```

1. Remove the newline code.

$ cat file1 foo bar baz $ tr -d "\n" < file1 foobarbaz%

Syntax:¶

The general syntax for the tr command is as follows:

tr [options] string1 [string2]

Additional Flags and their Functionalities:¶