[Solution] By the time I'd finished crafting the question, I'd managed to solve my problem, but posted the question ans solution anyway asthe fact that it was brought on by an updated for 'grub*' still has me wondering what changed.
S.S. Update Grub & NFS stops. I'm missing something sudo mount -va produces (on both client machines) / : ignored none : ignored /media/cdrom0 : ignored mount.nfs: timeout set for Thu Jul 30 20:52:51 2020 mount.nfs: trying text-based options 'vers=4.2,addr=192.168.aa.bb,clientaddr=192.168.aa.cc' mount.nfs: mount(2): Connection refused mount.nfs: trying text-based options 'addr=192.168.27.11' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Program not registered mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Program not registered mount.nfs: requested NFS version or transport protocol is not supported mount.nfs: timeout set for Thu Jul 30 20:52:51 2020 mount.nfs: trying text-based options 'vers=4.2,addr=192.168.aa.bb,clientaddr=192.168.aa.cc' mount.nfs: mount(2): Connection refused mount.nfs: trying text-based options 'addr=192.168.27.11' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: portmap query retrying: RPC: Program not registered mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: portmap query failed: RPC: Program not registered mount.nfs: requested NFS version or transport protocol is not supported sudo exportfs output is fine and lists te required system L.S. I noticed an Debian advisory about 'boot-hole'(?) about a new vulnerability in grub and decided id better see if there was updated code, which there was. 5 programs/files related to grub*. So performed the usual sudo apt-get update sudo apt-get upgrade sudo apt-get dist-upgrade reboot on the 5 active Devuan-beowulf boxen and all went fine. When bringing up s headless-server whose job is mainly related to file transfer, none of the nfs linkage were showing up on this. It was same problem on a user workstation, I've restarted nfs on the data server and check exports and restarted nfs on both the client machines, but I'm at a loss to work out what is going wrong. NFS is controlled by /etc/init,d/nfs-common, which is I understand now covers both nfs-server ans nfs-client. By restart, I mean stop then start as historically nfs didn't restart cleanly. Have I missed something? Something at the back of my mind says 'No, you have to run TWO processes. So I continue web searching (duckduckgo) and there is a mention of 'showmount' as a diagnstic, which tells me an rpc is missing. Solution I needed to start /etc/init.d/nfs-kernel-server start'. Showmount is now happy and 'mount -va' on the clients solves the mounting problem and all is as it should be. The question; is why did the 5 grub updates cause this to happen? None of the exported files are essential for booting. Oh well, something for the spare time. _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng