Textman

Textman is, self-explanatory, a text(Words and Letters) Inspector or a Bash script for searching text files with optionality.

Explanation:

1. main_menu function: This function runs an infinite loop (while true) that presents the user with options to either search for words, count a string, count a letter or quit the script. After each action is completed, the user is returned to the main menu.
2. Returning to Main Menu: The return command in the find_words, count_string and count_letter functions ensures that the script goes back to the main menu after executing these functions.
3. Exiting the Script: If the user enters 'q', the script exits.

Usage:

1. Make it executable with chmod +x textman.sh.
2. Run the script: ./textman.sh.