Installed Ubuntu 14.04 to eMMC successfully.
Ethernet PHY appears to be flaky. On some boots, Ethernet fails, and appears in dmesg:
[ 399.182341] libphy: PHY 4a101000.mdio:00 not found
[ 399.187508] net eth0: phy 4a101000.mdio:00 not found on slave 0
[ 399.193839] libphy: PHY 4a101000.mdio:01 not found
[ 399.198983] net eth0: phy 4a101000.mdio:01 not found on slave 1
Power cycling suggested here: https://groups.google.com/d/msg/beagleboard/9mctrG26Mc8/4FjzQDdjrEIJ
Cycled the power, and it seems to work now.
sudo apt-get install vim
sudo apt-get remove apache2
git clone ttps://github.com/joshdata/mailinabox
cd mailinabox
Edit setup/start.sh to lower minimum memory threshold to 450 MB so we pass.
sudo setup/start.sh
(Next time, edit reference to setup/webmail.sh out of setup/start.sh so Roundcube won't get installed.)
From directions here: http://software.opensuse.org/download/package?project=isv:ownCloud:community&package=owncloud
sudo sh -c "echo 'deb http://download.opensuse.org/repositories/isv:/ownCloud:/community/xUbuntu_14.04/ /' >> /etc/apt/sources.list.d/owncloud.list"
wget http://download.opensuse.org/repositories/isv:ownCloud:community/xUbuntu_14.04/Release.key
sudo apt-key add - < Release.key
sudo apt-get update
sudo apt-get install owncloud