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[Linux] grml live cd with virtual box installation

I don't know if any of you have the same situation as mine...
Suddenly I become an administrator for our local cluster. Instead of destroying things to be unrecoverable, I first want to give a try with virtual box for some excercise.

Thanks for my predecessor, Ingo, he already prepared a script for bootstrap, which will install Debian on the target machine directly with some essential services/routines later on.
To boot my Virtualbox and execute his script, I choose grml for the sake of simplicity.

However, I notice that using grml directly to boot the machine, the virtually plugged hard drives are all not partitioned yet. All you have to do is use gdisk /dev/sda to partition your hard drive (here depending upon your system. You can use fdisk -l first to check the targeted hard drive.)

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