Deepfreeze
I see dated threads on LQ about Deepfreeze, like this one, this one, this one, and even this tutorial.
I've also taken a look Ofris. I'm trying to track down a product or a project that actually functions like Faronics Deepfreeze. Something that is Quote:
I'm looking for a kernel level driver that intercepts all read/writes and redirects to a temp space. At one point in time, it seems like Faronics even offered a Linux version of Deepfreeze, but I can't seem to find that version of Deepfreeze anywhere on their website. Is anyone aware if such a product or project exists for linux? |
The simplest approach would be to install on an lvm and then boot a snapshot copy which uses a RAM-backed block device. That way any changes would go into RAM and be freed on shutdown, and you wouldn't have to copy the whole OS into memory. I'm not sure it would take any new code, just changes to init scripts.
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You don't get nuthin fer nuthin. Overlayfs has been fighting to get into the mainline for years - and aufs before that. Snaps are useful, but you lose everything - incuding logs. May suit, or not depending on situation. Really handy after a botched update ... |
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Any pointers to good documentation for overlayfs? Quote:
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Yes I was referring to snapshots - btrfs in my case, but conceptually similar to LVM.
There isn't much doco about overlayfs as it hasn't made it to the mainline kernel (yet). Ubuntu seem to have done a bit to make it available to their users - there is also overlayroot, a package (primarily) for Ubuntu. Seems overlayfs may be in rawhide soon if you use Fedora. |
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