Oracle Installation and Unix Question

13. What is the difference between a soft link and a hard link?
 
  • In the UNIX operating system, a filename can point either to the data of the file or another file.
  • A soft link or symbolic link refers to a filename which points to another file while hard link refers to a filename that point to a file, which actually contains data.
 
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14. Can you change the priority of a process in UNIX?
 
  • You can use the renice command to change the priority of a UNIX process with the following restrictions.
  • A user can only change the nice value of processes, which they own.
  • A user cannot start processes with nice value less than 20.
  • A user cannot lower the nice values of their processes after they have raised them.
  • Root has full access to the renice command.
 
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15. What is the cut command in UNIX?
  The cut command in used to extract sections from each line of input.
 
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12. How will you determine which segment belongs to which database instances?
  You can use the ipcs – m command.
 
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