i use SystemImager to clone a SuSE 9.2 installation to the other nodes of a small web server farm. The image-retrieval from the golden-client to the imageserver by the SystemImager - Script getimage (in fact using rsync) fails sometimes because of strict file permissions beneath /sys (see list below).
As a workaround i make these files readable to root.
My question: Is this a severe security breach and should i script something to restore the original settings on every node ?
There is no need to copy the files in /sys at all. They are created by the kernel on boot, so whatever you write, will be gone anyway (like /proc) So just amke sure you create the mount point and the /etc/fstab entry for it. Use '/etc/sysctl.conf' to adjust /proc paramters. /sys is just the 2.6 kernel's extension to /proc.