If you can SSH as root, but you cannot as a user, then there's about a 99.8% chance your user is not in the SSH group. In OMV go to Access Rights Mgmt/Users. Look at the groups that your user is a member of. One of them should be "ssh"... Assuming that is the case, click the user, click Edit, Click Groups, go through the list and find ssh, and put a check mark next to it. Save/Apply the changes.
Genius! Thank you. That's it fixed.
As for your cat story, I'm in the sad category. I'm devastated for your sister, even though it is years ago. We lost a dog to an accident just before Christmas. I'm still having trouble getting over it. I never wanted a dog, but my wife did, and it turned out to be a really wonderful idea, until the moment she ran onto a road. I've written a blog post about our awful winter here: http://www.danceswithcats.uk/?p=2303
I've been using the name Danceswithcats for various forums and log-ins since 2001. I was single then, and had heard about message boards where you could meet people and chat. It seemed whizzy, and I signed up for one. My automatically-generated username would have been petermason9328 or something equally undistinguished, but the site had a link to an 'advanced' username generator, where you entered a couple of things you liked and it suggested a name. I put in dancing and cats and it spat out catdancer, which I thought was a slight underuse of technical wizardry. Anyway, I had the TV on and there was a trailer for a broadcast of the film, Dances With Wolves, and inspiration struck.
About a decade ago, I registered the domain name danceswithcats.net, and five or so years ago, I bought danceswithcats.uk. About twice a year, I get an email form a very nice gentleman in New York, trying to sell me danceswithcats.com. His initial offer was several tens of thousands of dollars. Each time he contacts me, I counter-offer $5. I wish him well with it. He's currently got it up for sale for $3395. Times must be hard.
Thanks again for your help. I have had nothing but good experiences on this forum. I love computers and have been playing with and using Linux computers for over ten years, but I am one of those people for whom technical stuff just does not stick. Even though the internet drifts ever closer to being a market rather than the library I assumed it would be when it began, forums like this preserve its original promise, by being a pool of knowledge, shared with friendship.