THE TRANSLATOR

The tr command replaces characters

in text files. The command

reads the standard input and

sends the results to standard output. But

of course, you can use the familiar operators

to redirect both streams. In fact, tr

really shines in combination with other

shell commands.

Simple Replacements

The tr command expects two strings as

arguments and replaces all the occurrences

of the first argument in a text

with the second argument. This may

sound complicated, but let’s look at a

simple example. The following command

replaces the “e“s in “Petronella”

with “a“s: