I google’d a lot and found no sufficient solution to the rather common problem.
This two directives need to be added to /etc/proftpd/proftpd.conf
This one switches the capabilities module on and enables the execution of chown():
<IfModule mod_cap.c> CapabilitiesEngine on CapabilitiesSet +CAP_CHOWN </IfModule>
And this one defines which user/group it shall set:
<Directory /var/www> UserOwner www-data GroupOwner www-data </Directory>
Then just restart the server:
service proftpd restart
Hope this helps.
proFTPd Documentation Quicklink:
