Unix & Linux Asked by Willie McKemie on December 12, 2021
I have an old headless box running Caldera Linux from 1990s. There is no SSH in Caldera. The box has no USB or other ways to add a portable drive. Years ago, I had similar Linux boxes and I used NFS to back up. My other boxes have become more modern and I have not made a back up of the Caldera box in years. I’m feeling a bit insecure. Via telnet, I use the box regularly and add data.
I was considering pulling the drives out temporarily and turning them into USB drives. But, right now, I’m trying NFS again. Over the years, I’ve tried to mount the Caldera on a more modern Debian/Ubuntu/Mint box. In every case, I’ve failed and put the project aside as not urgent.
I’ve just done done a fresh Mint 19 install just to pursue this problem. For naught:
root@willie-Latitude-E6420:/mnt# mount -t nfs 192.168.110.16:/ /mnt/bookkeep
mount.nfs: Protocol not supported
Can anyone offer any insight on the incompatibilities in NFS that have been introduced over the years as "improvements"? Can anyone suggest a distribution that might support old NFS mounts? Or other work arounds?
rpcinfo -p bookkeep
program vers proto port service
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
300019 1 udp 731 amd
100005 1 udp 766 mountd
100005 2 udp 766 mountd
100005 1 tcp 769 mountd
100005 2 tcp 769 mountd
100003 2 udp 2049 nfs
100003 2 tcp 2049 nfs
100001 13 udp 780 rstatd
100001 3 udp 780 rstatd
100001 2 udp 780 rstatd
100001 1 udp 780 rstatd
100001 13 tcp 785 rstatd
100001 3 tcp 785 rstatd
100001 2 tcp 785 rstatd
100001 1 tcp 785 rstatd
rpcinfo -p localhost
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100005 1 udp 53399 mountd
100005 1 tcp 46155 mountd
100005 2 udp 49673 mountd
100005 2 tcp 47513 mountd
100005 3 udp 42853 mountd
100005 3 tcp 54595 mountd
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100227 3 tcp 2049
100003 3 udp 2049 nfs
100227 3 udp 2049
100021 1 udp 34963 nlockmgr
100021 3 udp 34963 nlockmgr
100021 4 udp 34963 nlockmgr
100021 1 tcp 46437 nlockmgr
100021 3 tcp 46437 nlockmgr
100021 4 tcp 46437 nlockmgr
Looking at the rpcinfo
output for the server, which I assume is bookkeep
, you can see that NFS is only offered as version 2:
rpcinfo -p bookkeep
program vers proto port service
100003 2 udp 2049 nfs
100003 2 tcp 2049 nfs
Armed with this information we can attempt to force the client to fall back to that particular (ancient) version
mount -t nfs -o vers=2 bookkeep:/ /mnt/bookkeep
Answered by roaima on December 12, 2021
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