I export a directory via NFS using the following options: rw,sync,no_subtree_check,no_root_squash
On the client, I mount it on /mn/test I have the following setting in the /etc/group file at the client: shadow:x:42:www-data So the following command works without problems: # sudo -u www-data cat /etc/shadow # ls -l /etc/shadow -rw-r----- 1 root shadow 733 Aug 1 19:20 /etc/shadow I have a similar file with the same permissions on the NFS share: # ls -l /mnt/test/etc/shadow -rw-r----- 1 root shadow 852 Nov 12 06:43 /mnt/test/etc/shadow # sudo -u www-data cat /mnt/test/etc/shadow cat: /mnt/test/etc/shadow: Permission denied Andy idea why that does not work? Above test was done using a nfs-kernel-server. If I use unfs3 server instead, www-data can read the file even if it is not in the shadow group! I am a bit clueless - any ideas?
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