Re: [Proftpd-user] 550 Permission denied during upload / Virtual users

  
> Questions:  
> 
> 1.  How do I associate these virtual users to linux file permissions to
> allow write?2.  I also have multiple publishers working together who can
> upload/remove each other's files.   Can these be grouped into the same
> group? 

Unix filesystem permissions are based on the user UID and GID, not based
on username.  So to the Unix kernel, it doesn't matter whether users are
defined by /etc/passwd, in a SQL database, etc -- all that the kernel
(and the filesystem) care about is the numeric UID/GID associated with
the process.

This means that to allow writes to a directory, the process in question
needs to have a UID and/or GID which has write permission to that
directory.

For these situations, I highly recommend using `ls -aldn`; the `-n`
option tells ls(1) to display ownership in _numbers_, not names -- and
then you can correlate the owning IDs with the UID/GID values you give
to your virtual users.

> 2.  I also have multiple publishers working together who can
> upload/remove each other's files.   Can these be grouped into the same
> group?

Yes, absolutely.  I am assuming that you have "virtual groups" defined,
along with your "virtual users"; you can define your users as belonging
to any groups you wish.

Hope this helps,

TJ

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