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ssh

Cloning Partitions Across SSH

Many times I've had to image/clone partitions of the machines across and SSH contection.  Often there is not sufficient space to compress the whole image and transfer it over to the new machine and the desploy it inside that machine. This is very common with VPS providers. 

Instructions

Boot up both machines in single user mode or with a boot CD. I like using rescue CDs/OSs. Make sure all of the source partitions and destination partitions are unmounted or mounted read-only. 

Allow UID 0 accounts to login but not root over SSH

Introduction

More than once, I've needed root access to a server over SCP.  As we all know, allowing SSH access with the root user is a blaring security hole because the user is a well-known userid with superuser access. This makes it the first thing that a hacker or script-kiddie will check.  If you create another user with userid number 0 and set PermitRootLogin to 'no' in the sshd_config file, you will still not be able to login.  The PermitRootLogin option actually blocks ANY user if their user id number equals 0.

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