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Remove All Characters In A File?

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Remove All Characters In A File? UNIX Help forum discussing the Unix Operating System and all variants including Irix, Solarix, and AIX. Unix was designed as a true multi-user operating system.

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  #1  
Old June 17th, 2004, 03:44 PM
srarcade srarcade is offline
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Remove All Characters In A File?
Can I use sed or tr to remove all characters in a file? I want to have just a empty file remaining with nothing in it.

Thanks!
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  #2  
Old June 17th, 2004, 08:48 PM
NPRao NPRao is offline
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Use -

$ > filename
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Old June 18th, 2004, 07:16 AM
stevengs stevengs is offline
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sweeeeet.
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Old June 21st, 2004, 02:17 PM
srarcade srarcade is offline
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Hrmm- bash dosn't seem to understand $ as a command. But as a workaround, i simply made a new empty file and just use 'cat blankfile > myfile' to clear it out. I just thought it would be cool to eliminate that extra file.
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Old June 21st, 2004, 03:15 PM
stevengs stevengs is offline
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or:
cp /dev/null file

-Steven
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Old June 21st, 2004, 03:17 PM
NPRao NPRao is offline
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Quote:
bash dosn't seem to understand $ as a command

The $ was the prompt or PS1 and not a command.
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Old June 21st, 2004, 03:29 PM
stevengs stevengs is offline
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cp /dev/null file

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Whoops, double posted, how do I remove one???

PS, technically the "> file" is not empty. There is one empty line in it (read - carriage return/line feed). Compare the output of such a file (cat) and a newly created file (touch).
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Old June 22nd, 2004, 03:00 AM
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echo -n "" > /my/file
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