Linux command (+): lsof command

1. Recursively view file information for a directory: Lsof test/test1

2. Do not use the +D option to traverse through all file information for a directory: lsof |grep ' Test/test3 '

3. List the file information opened by a User: Lsof-u username

4. List the file information opened by a program process: Lsof-c MySQL

5. List more than one process open file information: lsof-c mysql-c Apache

6. List the file information opened by a user and a process: Lsof-u test-c MySQL

7. List all network connections: Lsof–i

8. List who is using a port: lsof-i: 3306

Linux command (+): lsof command