Using the cat
Command
The cat
(short for concatenate) command displays the contents of a text
file on the screen. It is often used to display short text files such
as script files (similar to batch files). Because cat
flashes through the entire file rapidly without pausing, you
should either be prepared to stop & start the scrolling with the Control-s
and Control-q keys or use the more
command (covered next). The cat
command can also be used to concatenate (join) two or more files
into one large file.
| Command Format: |
| cat filename(s) |
Figure
shows the use of the cat
command to display the dante text file in the /home/user2
directory. If the file fills more than one screen, the data scrolls
off the screen - unless you are using a scrolling window, such as a
terminal window, within the CDE environment.
Using the more
Command
Use the more
command to display the contents of a text file one screen at a time.
If the information in a file is longer than one screen, the following
message appears at the bottom of the screen where n is the percentage
of the file already displayed.
--More--(n%)
The on-line manual pages use the more
utility for display purposes, so the scrolling keys in Figure
are the same ones used to display man pages. Using cat or
more
to read executable or binary files can cause a terminal or window to
hang and you would need to use Control-c to restore the shell
prompt.
| Command Format: |
| more filename(s) |
At the --More-- prompt, you can use the
keys in Figure
to control the scrolling capabilities.
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Interactive
Media Activity
(Flash,
95 kB) |
| |
Using
cat
and
more
In this media activity, you are logged in as user2 and your current working directory is: /home/user2. Refer to the Class File Tree Structure by clicking the 'tree' button located on the Menu Bar and type the commands that would accomplish the requested objectives.
Note: Be sure to press enter after each one. Click on step 1 to begin.
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