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Re-imaging a compute node back to a working state

If you accidentally misconfigure software on a cluster compute node you can always revert it back to a working image. In order to prepare a node for imaging you first set it to boot into the cloner3 image the next time it powers on:

$ act_netboot -n <node name> -set=cloner3

Next you simply reboot the machine or you can remotely reboot it by:

$ act_powerctl -n <node name> reboot

Remember, every time you change software or configurations on your compute nodes you should update their backup image! You can update an image by logging into the compute node you want to update the image from and run the command:

$ /act/cloner/bin/cloner –server=<head hostname> –image=<image name> —update

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