Review Questions

  1. Why is accurate time important on a Linux system? What options exist to keep time in sync?

  2. Describe the difference between system time and the hardware clock.

  3. How is time stored on a Linux system? How is the time zone used to modify this value?

  4. What two things does the syslogd server use to categorize log entries? What are the limitations of this format?

  5. Give some examples of what kinds of messages you would expect to see in /var/log/messages.

  6. What does lpd do to handle incoming print jobs destined for empty print queues?

  7. Describe the kinds of information included in /etc/printcap.

  8. What is the function of a print filter?

  9. What does the -P option specify to the print commands?

  10. When is it useful to pipe into the standard input of lpr instead of simply using a filename as an argument?

  11. How is the Ghostscript program used in printing to a non-PostScript printer?

  12. What filter is used on a Linux system to print to remote printers on Windows clients?

  13. What are the common Mail Transport Agents (MTAs) used on Linux systems? Give a brief description of each.

  14. What command would you use to view the contents of the mail queue on a system running sendmail? What command would you use to force a resend of that queue?

  15. What is the easiest way to forward all email coming into an account to another email address?

  16. What file is used to maintain email aliases for local users? Describe the maintenance procedure for this file.

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