I'm having difficulty with users and my ftp site. It seems that the user names and passwords work fine. But when I try to upload a file using my or their usernames, I get an error message that I don't have permission to perform this task.
I'm using proftp and I have UMask set to 022.
I guess I am confused as to what ultimately controls what permissions a user to the ftp site has- the proftp.conf umask setting or directory and files settings for each user I setup with adduser.
Basically, I just want them to be able to upload a file and overwrite it if necessary.

Thanks

// Moderator note: I'm moving this to /Networking. Reason: (.*proftp(.*control|.*settings)).

The access permissions of the linux systems are used, doesn't matter much if you limit access with the proftpd.conf, last check is always file system access rights!