Problems moving /var to another partition Ubuntu 16.04 LTS EC2 AWS

Asked Jan 10 '17 at 01:42

Active Jan 10 '17 at 01:42

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I usually create EC2 instances on AWS using Ubuntu 14.04 LTS. Now they change the standard edition to 16.04 LTS, that I never used before.

I need to put /var in a greater disk, to support logs, etc.

As usually, I've created the instance, mount a disk on /mnt and copy the /var to it.

After that, I remove original /var and mount the device on a new /var. It's a simple procedure.

On Ubuntu 14.04 I never had any kind of problem to do it, but on 16.04 I've had a lot of error messages like this:

cp: cannot open '/var/lib/lxcfs/cgroup/devices/user.slice/devices.allow' for reading: Permission denied

I'm doing this by root.

Any idea?

Thanks a lot.

asked Jan 10 '17 at 01:42

... "and copy the /var to it" how, exactly? are you preserving file ownership and permissions? – steeldriver Jan 10 '17 at 02:06
Yes. I always did it on 14.04 LTS with no problems. – Emanuel Alexandre Tavares Jan 10 '17 at 02:23
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The linked answer doesn't answer this question, because I've just tried it. Using rsync -a to copy /var with Ubuntu 16.04 produces permission denied errors as described here. – TommyPeanuts Dec 15 '17 at 20:12

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