Practical operation

1. Open the terminal returns to the root.
2. View all current files in the Road King.
3. See all the current directory path.
4. Create a directory z11, z22, z33.
5. Delete the directory z11.
6. Enter the directory z22.
7. Create a file al (touch command), create a file a2 (echo command).
8. Copy a2 ~ z33.
9. Moving files a1 ~ z33.
   10. The return path to the root.
   11. Delete z22 directory.
   12. Check each z22 and z33.
   13. Review the file man_db.conf.
   14. Review the first 10 lines of the file man_db.conf .