How to fix owncloudcmd cookies.db: device not open

Problem:

While running owncloudcmd, you see an error message like

QIODevice::read (QFile, "/root/.local/share/data//ownCloud//cookies.db"): device not open
Set proxy configuration to use system configuration
Cannot load system exclude list or list supplied via --exclude
Aborted

Solution

First create the directory from the error message:

mkdir -p /root/.local/share/data/ownCloud/

Now create an empty cookies.db:

touch /root/.local/share/data//ownCloud//cookies.db