221-224.txt

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Author:
CapptainClutch
ID:
130049
Filename:
221-224.txt
Updated:
2012-01-23 18:56:55
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CDC3D052 Volume2
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Description:
221-224
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  1. Define the following features of UNIX: a) Multi-user - b) Multitasking - c) Simplicity - d) Flexibility - e) Portability -
    -Allows many users to work on the same system at the same time. -Execute numerous programs at the same time. -One command line and basic commands to accomplish a task. -Choose from many different commands. -Can run on many different types of hardware.
  2. What is the kernel and what are its major functions?
    The basic memory-resident portion of the operating system. Its major functions include memory management, system access, maintaining the file system, error handling, input and output, and resource allocation.
  3. What is a shell and what are its three main uses in UNIX?
    A user interface to UNIX. It is simply a program that allows the system to understand your commands. The three main uses for a shell in UNIX are interactive use, customization, and programming.
  4. How do you respond to the UNIX login prompt?
    By typing in your user id.
  5. What two ways can a user be issued a password?
    By the system administrator or by the option of selecting your own password when you request an account on the system.
  6. What prompt do you get after successfully logging into the UNIX system?
    Dollar sign ($).
  7. What do you type at the command line prompt to change to the three different shells?
    csh - C shell ; ksh - Korn shell ; and sh - Bourne shell.
  8. Define partitions.
    Logical sections into which disks are divided. Each partition is used for a particular purpose.
  9. What flexibility does a disk-partitioning scheme give?
    The flexibility of using parts of a single disk for different purposes.
  10. Define files.
    Files are the basic unit for storing and manipulating a collection of logically related information known as data.
  11. Define directories.
    A directory is a file that holds other logically related files and contains information about the location and attributes of these other files.
  12. Explain the following traditional directories provided with the UNIX operating system: a) /root - b) /bin - c) /dev - d) /usr -
    -Master directory and the highest-level directory of the UNIX file system. -Contains executable files for the most commonly used UNIX commands. -Contains device drivers. -Contains common files used by all users.
  13. Define a hierarchical file system.
    A structure in which directories are organized in a top-to-bottom view.
  14. Define the following terms: a) Pathname. b) A full pathname. c) A relative pathname.
    -A string of characters that describe what directory the file is in, as was well as the name of the file -The trace of the path from the root directory to the name of the file. -A path to a file relative to your present directory.
  15. List the uses of the following commands: a) pwd - b) cd - c) ls - d) cp - e) mv - f) more - g) pg - h) pr - i) rm
    pwd-Displays the current working directory. cd-Changes directories. ls-Lists the contents. cp-Copies files or directories. mv-Relocates files or directories. more-One screen full at a time. pg-One page at a time. pr-Formats a file. rm-Deletes file
  16. What is the purpose of the UNIX pipe?
    A pipe is a means of taking the output of one command and redirecting it as the input of another command.

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