SFTP Can't upload module despite using owner's credentials I'm new to both Linux and Drupal, but I can see that the owner and group assigned to the drupal modules directory is one of my SU accounts on the server. When I log on to SFTP I use that same credential. 

I tried to upload a module using Aptana studio and it tells me it can't create folders. 

Do you feel that there's additional ownership info needed on the server side? Would my folder rights not be applicable when connecting via SFTP?
Using ssh you can log in to the system to check about directory permissions using the same credentials you use with sftp.  

try..  

ssh user@host


to login and then use a number of commands to check permissions

ls -l                      //Lists files with permissions for user, group and other
chmod 755 dir/file         //Change file/directory permission
chown user:group dir/file  //Change the user/group ownership of file(s)


scp command can also upload file from local (*nix) machine to server.

scp path/to/local/file user@host:/path/on/server