Itc Questions

     1 after creating a directory what would be the linked list?
      
     2 what is the inode ? and tell me the inode table?
      
     3 how do we find out the mysql databases sizes?
      
     4 how to patch the kernal & revert back ?
      
     5 tell me the 5 fields of cron?
      
     6 how to create a swap in linux?
      
     7 make old-config ?