LAB 22: REDIRECTION

1. What are the names of the three file streams associated with your terminal?

2. What is a file descriptor?

3. What command would you use to:

   1. Redirect the output of the ls command to a file called lsfile ?

   2. Redirect and append the output of the date command to lsfile ?

   3. Redirect the output of the who command to lsfile ? What happened ?

   4. What happens when you type cp all by itself?

   5. How do you save the error message from the above example to a file?

   6. Use the find command to find all files, starting from the parent directory, and of type "directory." Save the standard output in a file called found and any errors in a file called found.errs .

   7. What is noclobber ? How do you override it?

   8. Take the output of three commands and redirect the output to a file called gottemall .

   9. Use a pipe(s) with the ps and wc commands to find out how many processes you are currently running.