What does the 'tr' command do?

The tr command in Linux is used for translating, deleting, or squeezing characters from standard input and writing the result to standard output. Its basic syntax is:

tr [OPTION]... SET1 [SET2]

Where:

• SET1 is the set of characters to be translated or deleted.
• SET2 is the set of characters that will replace those in SET1.

Main Functionalities:

1. Character Translation: Replace characters from one set with another (e.g., converting lowercase to uppercase).
2. Character Deletion: Remove specific characters from the input using the -d option.
3. Character Squeezing: Compress repeated characters into a single occurrence using the -s option.

These functionalities make tr a versatile tool for text manipulation in Linux.