terminal(macOs)
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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this is
![Lab Exercise 2: Review of DOS Commands
Part 1
a.
Enter the following DOS commands, and record or describe what is displayed.
-ver
-mem [ four kinds of memory should be shown. Project : find out what each type
is. ]
-vol [ for this one, after entering it once, change drives and enter it again. What
has changed? 1
-cls
b.
Choose a file name (eg: "dirlist.txt") and redirect the "dir" command to it. From
the last lab, you will recall that this can be done with the ">" key. So, enter "dir >
dirlist.txt", (or whatever file name you have chosen), without the quotes. Look at
the file using either "type" or a text editor. Record what it contains.
After completing the previous paragraph, enter "dir >> dirlist.txt", substituting
whatever file name you used. Now examine the file again. What happened.?
Now enter the command "del dirlist.txt", substituting whatever file name you
used. Try to view the file again. What happened?
The asterisk character "*" is used as a wild card in DOS commands. Try typing
the following three commands, and observe what happens with each. 1): "dir
*.txt" 2): "dir *.exe" 3): "dir *.com"](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb1ddeca0-db0c-4fb2-a11d-d0dc67b17cbe%2F75711fcd-631d-47af-b34c-44cfcd12ae8a%2F6b6cpnj_processed.png&w=3840&q=75)
Transcribed Image Text:Lab Exercise 2: Review of DOS Commands
Part 1
a.
Enter the following DOS commands, and record or describe what is displayed.
-ver
-mem [ four kinds of memory should be shown. Project : find out what each type
is. ]
-vol [ for this one, after entering it once, change drives and enter it again. What
has changed? 1
-cls
b.
Choose a file name (eg: "dirlist.txt") and redirect the "dir" command to it. From
the last lab, you will recall that this can be done with the ">" key. So, enter "dir >
dirlist.txt", (or whatever file name you have chosen), without the quotes. Look at
the file using either "type" or a text editor. Record what it contains.
After completing the previous paragraph, enter "dir >> dirlist.txt", substituting
whatever file name you used. Now examine the file again. What happened.?
Now enter the command "del dirlist.txt", substituting whatever file name you
used. Try to view the file again. What happened?
The asterisk character "*" is used as a wild card in DOS commands. Try typing
the following three commands, and observe what happens with each. 1): "dir
*.txt" 2): "dir *.exe" 3): "dir *.com"
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