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How can I append a text at end of file after displaying the file

 
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# 1  
Old 11-07-2009
How can I append a text at end of file after displaying the file
I have a file "sample.txt" with the content as below:
Hi
This is a Sample Text.

I need a single command using cat which serve the following purpose.

1.display the contents of sample.txt
2.append some text to it
3. and then exit

But, all should be served by a sinle command.Smilie
# 2  
Old 11-07-2009
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