iOS AND ANDROID
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Choose a tagThanks to Tim Carter from Pedrera on getting me this info: http://www.pedrera.com/blog/expressionengine-on-rackspace-cloud/
Other links that helped me: https://help.ubuntu.com/11.10/serverguide/ftp-server.html
http://www.howtogeek.com/howto/ubuntu/add-a-user-on-ubuntu-server/
I used vsftpd (https://help.ubuntu.com/10.10/serverguide/C/ftp-server.html), but you can use whatever you prefer. Be sure to follow FTP software documentation to ensure proper security!
sudo apt-get install vsftpd
The user created in step 1 (Rackspace Server Setup) should have their home directory set to /var/www. Use this command:
sudo usermod -d /var/www yourusername
Now set this user as the owner:
sudo chown yourusername /var/www sudo chgrp yourusername /var/www -Rv