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Ankur Agarwal
Asked: 2018-02-09 16:18:59 +0800 CST

Why am I getting “Permission denied” while trying to create a file

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jenkins@hostname:~/dir1/dir2$ ls -ld /some-nfs
drwxrwxrwx 121 171 146 6290 Feb  8 15:38 /some-nfs

jenkins@hostname:~/dir1/dir2$ ls -ld /some-nfs/important-dir
drwxrwxrwx 3 jenkins jenkins 28 Feb  8 15:39 /some-nfs/important-dir

jenkins@hostname:~/dir1/dir2$ mkdir /some-nfs/important-dir/important-dir/logs # able to create a dir

jenkins@hostname:~/dir1/dir2$ ls -ld /some-nfs/important-dir/logs
drwxrwxr-x 2 jenkins jenkins 0 Feb  8 15:39 /some-nfs/important-dir/logs

jenkins@hostname:~/dir1/dir2$ touch /some-nfs/important-dir/logs/file # not able to create a file
touch: cannot touch ‘/some-nfs/important-dir/logs/file’: Permission denied

Why am I getting Permission denied in the last step ?

I was expecting to be able to create the file.

linux

1 Answers

  1. NFS by default will downgrade any files created with the root permissions to the nobody:nogroup user:group.

    This is a security feature that prevents privileges from being shared unless specifically requested.

    It may be that you would like to enable the "no_root_squash" option in the nfs server's /etc/exports file.

    There is a really nice article about root_squash that I recommend you to read before deciding if it's the correct solution for you.

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