Hi Merlin, first, read the FAI guide. So you get an overview of the concepts of FAI. You should make a backup of the current nfsroot. I do this using cp -a /srv/fai/nfsroot /srv/fai/nfsroot-old
Then recreate the nfsroot. fai-make-nfsroot -fvP Then check the log output. For updating the pxelinux version I always copy the following files from a machine running a newer Debian (currently buster or newer) to my stretch FAI server. log into the buster machine: The copy these files /usr/lib/syslinux/modules/bios/ldlinux.c32 /usr/lib/PXELINUX/pxelinux.0 You want to use /usr/lib/PXELINUX/lpxelinux.0 instead of pxelinux.0, because this supports http tranfers. Put those files into /srv/tftp/fai on your FAI install server. lpxelinux.0 has to renamed to pxelinux.0 Check if you need to adjust the pxelinux.cfg file, for e.g. if the kernel version has changed. I create a template the fai-chboot and then use something like this: fai-chboot -vc stretch-new.tmpl client07 It hope this helps. -- regards Thomas