Linux novices call directories "folders." You want to search all the directories and subdirectories for a string pattern. How do you do this?
1. Change directories into the directory where you want to start searching.
2. Run this command: grep patterntosearchfor * -ir
Replace "patterntosearchfor" with the pattern you want to find. Use all lower case. The "i" flag tells the Linux server to return case-insensitive matches. The "r" flag tells the Linux server to search subdirectories (child directories) of the directory you were in.