Zeroing Out A File In Unix

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Anybody can help HOW TO FIND THE FILE SIZE IN UNIX.

Active6 years, 4 months ago

This is probably obvious, but Google seems to have let me down. I need to create a zero byte file with arbitrary names on Unix (AIX, ksh). What is a good command that will do this. Something I can script obviously.

Just to be clear Im not doing anything stupid. This is a script to generate certain testing scenarios. (Checking proper behavior when handling 0-byte files.)

gbtimmongbtimmon
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3 Answers

Save your keystrokes and the unnecessary process, redirection will do:

Adrian FrühwirthAdrian Frühwirth
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Active1 year, 4 months ago

I'm currently running Ubuntu 12.04 and want to completely format my laptop so I can install Windows 7 (replace Ubuntu).

When I put in my bootable USB with the OS it just shows a black screen with a white blinking cursor on the top left corner. I wait for hours (to be specific 5 whole hours) waiting for something to happen but I get nothing, so I pull out the USB and my Ubuntu 12.04 loads up.

Install netbeans sh file ubuntu server. Repeated this several times with putting different boot priority options on top-est that relate to USB but the results are same. I go and visit some sites on the net like this http://www.techspot.com/community/topics/cant-replace-ubuntu-with-windows.175716/ that say I have to zero out my hard drive.

My question is how?

Note: Erasing out all my data is no problem cause I have nothing important to backup.

If I have to lose my primary OS (Ubuntu 12.04) in the process I am ready to as my aim is just to install Windows 7 successfully. Please don't answer that there is something wrong with my USB or my USB reader/port/hardware or the content inside the USB cause they all works fine on my brothers PC as it boots up flawlessly.

Mohd Arafat Hossain
Mohd Arafat HossainUnix

Search For A File In Unix

Mohd Arafat Hossain
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3 Answers

Zero-out drive on Linux is done via:

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where sdX is the device of the drive to delete.

If you're not aware on how to do this, press Ctrl+Alt+T from Ubuntu, and type following:

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In example above, sdb is the second connected drive.

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NB! This will erase your drive completely. Use at your own risk.

EDIT:

Optionally, you might want to add status=progress to show progress status:

Andrejs CainikovsAndrejs Cainikovs

It is really questionable whether this is an Ubuntu question at all.

If you have set the BIOS of your computer to boot from the USB first you should have no trouble. It should boot entirely from the USB stick and it should not matter how the Hard Drive is formatted.

Windows will format the Hard Disk and anything there will be overwritten.

Search for a file in unix

You should not have to zero out the Hard Drive at all.

Zeroing Out A Scale

user4815

How To Find A File In Unix

Maybe I can add a little insight here. When booting with a Windows CD, the Windows installer program is kind of stupid and worthless as most Microsoft products are. What can end up happening is the operating system of the Windows installer CD will hand and die. Mostly because it doesn't know what to do with a hard drive that is not zero'd, or doesn't have Windows. It doesn't give an error, just hangs.

I happen to have a perfect example right in front of me right now. Even when I boot with an Ubuntu CD, on this ASUS computer, the OS, begins to start, then it touches the hard drive, as any good OS should do, in order to see what resources are present.

On this particular computer, (and the problem is with the BIOS of the particular machine) it appears to hang, for almost 20 minutes, for each touch of the hard drive. So booting a live CD on this computer can take almost 20 minutes. Just in case, I'd check for a BIOS upgrade on your system, it will prolly fix the USB booting issues and maybe the timeout routine for no hard drive access, although that's more unlikely.

If you can boot from the live CD, just let it sit. Shouldn't take more than an hour, if you have the same booting flaw as this machine. Once it comes up, do the HD zero out, in a pinch though, boot with your Ubuntu on HD, and zero it out anyhow. It should zero out enough before the OS crashes to allow your worthless Windows install CD to work.

Peachy

How To Open A File In Unix

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Zeroing Out Your Account

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