Solaris Troubleshooting NFS : error ‘cp: cannot create : Permission denied’
When trying to copy a file across an NFS mount point the error “Permission denied‘ is reported.
nfs client# cp /etc/release <nfs mount pt>
cp: cannot create <nfs mount pt>/release: Permission denied
This error can happen if the shared (exported) directory on the NFS server, the one you are trying to copy the file to doesn’t have ‘write’ rights for the specific user. Note. This should not be confused with how the directory was shared out. See example below.
In the example below the directory was shared out with ‘rw’. This would make one think that all is well but the problem is actually with the physical directory’s permissions.
nfs server# share
– /shared dir> rw “”
Notice in the output below only ROOT has ‘write’ (w) rights to the NFS mounted directory. This would allow ROOT to copy/delete files but ALL other users would be restricted.
nfs server# ls -ld <shared directory>
drwxr-xr-x 3 root root 512 Apr 4 13:27 <shared directory>To resolve, just add ‘write’ (w) rights for the specific user(s). As in the case below, ‘write’ (w) rights were provided so ALL users can copy/delete files to/in the shared directory.
Note: Adding ‘write’ (w) permissions to the shared directory will not allow you to delete any existing files. You will need to add the ‘write’ (w) rights recursively [-R] so each existing file also receives the same rights.
nfs server# chmod [-R] 777 <shared directory>
Hi Ram,
Please guide me how can I provide Read write access to a Fs on client only to users root and oracle
where do i need to mention the users in the below command on master server:
share -F nfs -o rw=client masterser:/filesystem /mountpoint.
Thanks!!
Laxxi
pleae try — share -F nfs -o rw=oracle:root /filesystem
hi ram,
client side as a ROOT i am not able to write anything
ls -ld
drwxrwxr-x 15 oracle dba 1024 Dec 12 06:31 /BACKUP
Showmount -e ee.xx.yy.zzz
/BACKUP (everyone)
when i am writing any thing it showing that root@xyzDB # touch bb
touch: cannot create bb: Permission denied
i checked Serverside /etc/dfs/dfstab it is shared with
share -F nfs -o rw -d “BACKUP” /BACKUP
dfmounts
RESOURCE SERVER PATHNAME CLIENTS
– XYZMDB1 /BACKUP XYZPRREPDB
so can you please suggest me what exactly the problem
Venkat, “root on nfs-client” is not equals “root on NFS server” … it will be just treated as Nobody account. the /BACKUP has r-x permission for others and the “nobody” ID will be treated as others for this directory, that’s the reason for permission denied.
If you want to make “root on clients” equivalent to “root on NFS server”, you have to share using following options ‘ share -F nfs -o rw,root=clientname -d “BACKUP” /BACKUP ‘ .