The tr command is a versatile tool in the Unix command–warrior's kit. It is used to craft elegant one-liner commands. It performs substitution of characters, deletes selected characters, and can squeeze repeated characters from the standard input. Tr is short for translate, since it translates a set of characters to another set. In this recipe, we will see how to use tr to perform basic translation between sets.
Translating with tr
Getting ready
The tr command accepts input through stdin (standard input) and cannot accept input through command-line arguments. It has this invocation format:
tr [options] set1 set2
Input characters from stdin are mapped from the first character in set1 to the first character in set2, and so on and the output is...
