Write a shell script that searches the file contents in a directory and its sub-directories for a text string given by the user. It list all such file names having that given string and store in a temp file “example_dir” 

Explain the role and importance of following tools for quota management in Linux:

•  quotacheck 
•  repquota 
•  quota 

Discuss the Users' Administration in WINDOWS 2000. What are the different types of user groups supported by Windows 2000? Discuss the scope and limitations of each group. Also, list the tools available in Windows2000 for user management.