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    s23
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    Shell Redirection

    Redirection

    cat /dev/null > file 	clear out a file
    
    
    >	redirect output to file
    >!	Redirect output to file even if file is protected
    
    >>	redirect output to a file apends to existing file
    
    >>! 	redirect output to a file apends to existing file even if file is protected
    
    < 	redirect file to a commands input
    
    <<	redirect file to a commands input untill txt encounterd
    
    >&	redirect output to file and error aswell
    
    	cat Files* >> NewBigFile	
    
    	wc << cat file		WC word count 
    
    2>&1   Redirect error out to std out
    
    

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    Header Redirect to a webpage in PhP:

    <? Header("Location:$gourl"); ?>

    http://somedomain.com/redirect.php?gourl=http://someotherdomain.com/hello.html

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