Does the dd command run from Ubuntu 11.10 Live CD touch a hard drive in a way that would change environment variables?

Asked by Kent Neilson

I used the Live CD to boot and duplicate a hard disk using the dd command.
Duplication command: sudo dd if=/dev/sda of=/dev/sdb bs=512k
After duplication the original drives environment variables had changed? Can the Live CD do this?

Thank you,


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Ubuntu coreutils Edit question
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Kent Neilson
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Wyatt Smith (wyatt-smith) said :

dd performs low-level copying of raw data. It will not change the environment variables.

I am curious as to what environment variables changed. Where these nix environment or windows environment?

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Kent Neilson (kentneil) said :

These were nix environment variables.