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Backstory:
I have a CentOS image on VirtualBox running on my local machine. (I created a group hadoop and user hduser to run Hadoop services on it.) I created a folder on my MacOS called shared. I did the same in the the VirtualBox image (under user hduser).

The directories are successfully mounted in the sense that I can see all files in shared from both machines. I can create and paste new files into shared on my local machine, but I cannot do the same in the virtual machine.

Issue:
There seems to be a write permission error, as I can see all files, but cannot write. Below is me testing to write a file in shared on the virtual machine. 

[Error writing shared/test.txt: Permission Denied]

Error writing shared/test.txt: Permission Denied

Here's the permissions:
Attempting to write to shared.

ls-l

Here's my /etc/fstab: enter image description here

I have read up on the issue and tried several things from:

usr
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    [Please don't post images of text](http://meta.unix.stackexchange.com/questions/4086/psa-please-dont-post-images-of-text). Copy and paste the text itself **into your question** and format it as code by selecting it and pressing Ctrl-K or by using the editor's `{}` icon. BTW, since this has nothing to do with `nano`, you don't need a screenshot of nano either - `touch shared/test.txt` would have shown the problem, and `grep shared /etc/fstab` would have shown the relevant fstab entry. – cas Feb 22 '18 at 22:22
  • @cas Okay, I wasn't aware. I did attempt to add the text from the images in my post. Thanks. – usr Feb 23 '18 at 10:37

1 Answers1

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I have managed to solve the issue. I initially followed the instructions from this github post where it is suggested to use these settings:

shared    /home/hduser/shared    vboxsf   defaults,uid=1000,gid=1000,umask=0022    0    0

However, that didn't work in my case. Instead it is either:

shared    /home/hduser/shared    vboxsf   uid=1001 defaults    0    0

or

shared    /home/hduser/shared    vboxsf   uid=1000 defaults    0    0
usr
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