On Fri, Jul 14, 2017 at 10:46:14PM -0400, Nick Holland wrote: > On 07/14/17 09:00, Raimo Niskanen wrote: > > Hi misc@. > > > > I wonder how to restore from an /altroot backup? > > > > (I missed that pax -r happily writes absolute paths and wrote over > > /etc from a backup file of another machine) > > > > > > Is it to dd(1) back all but the first 16 blocks - the reverse of what > > daily(8) does? Is that all that is needed? > > don't... > > > (I missed to skip the first 16 blocks, and I used the block devices instead > > of the character devices. The result was a vegetable, and would like to > > understand which of my mistakes that were fatal.) > > yeah, that's why. It CAN work, but ... it is the hard way and it's > error prone. > > better way: let's say sd1k is your /altroot... > > # mount /dev/sd1k /altroot > > now...it's just a normal file system on a normal place. Copy out > whatever you want. umount it when done, please. > > Nick.
Yes, thank you! That is the safe way. In this case I wanted to get rid of all files that my pax fumbling had put there, so I wanted to clear the root filesystem and copy back all from /altroot. But then I also would have ro run installboot on the restored root filesystem, right? Is that the right(tm) way to do it? -- / Raimo Niskanen, Erlang/OTP, Ericsson AB
