How to Disable LXCFS in Ubuntu Without Breaking Your System

Learn how to disable LXCFS in Ubuntu safely, fix Docker user errors, and remove cgroup mounts with real commands. A clean, clear guide for everyday users. Our 24/7 Live Support Team is always here to help you.

If you’ve been fighting strange Docker errors on your server, you’re not alone. One common culprit is LXCFS. And when it shows up uninvited in your setup, things get messy fast. So today, let’s break down the real-world steps to ubuntu lxcfs disable so your Docker environment behaves the way it should.

Most users only notice the issue when a simple container refuses to start, usually throwing this vague message:

docker: Error response from daemon: Container command 'date' could not be invoked.

The first reaction is confusion. But once you dig a bit deeper, you’ll spot the problem: LXCFS is mounting its own cgroup paths, and Docker doesn’t like that at all, especially when user namespaces are turned on.

What Is LXCFS and Why It Causes Trouble

LXCFS is a small FUSE filesystem that makes containers feel more like VMs. That sounds good in theory, but if you’re not using LXC or LXD, it only gets in your way.
And this is where the keyword ubuntu lxcfs disable becomes important.

To confirm whether LXCFS is causing the error, run:

mount | grep lxc

If you see a long list of cgroup mounts like:

tmpfs on /run/lxcfs/controllers

memory on /run/lxcfs/controllers/memory

cpu,cpuacct on /run/lxcfs/controllers/cpu,cpuacct

then yes, LXCFS is hijacking your cgroup layout.

The Quickest Fix: Remove LXCFS Completely

If you don’t run LXC/LXD, removing LXCFS is the cleanest way forward.
This is the safest and most popular solution for anyone looking to ubuntu lxcfs disable without breaking anything.

Use:

sudo apt-get remove lxcfs

If you want a deeper cleanup:

sudo apt-get remove --auto-remove lxcfs

Or wipe configs as well:

sudo apt-get purge --auto-remove lxcfs

After that, reboot:

shutdown -r now

Once the system comes back up, you won’t see the extra cgroup mounts anymore. This instantly clears the Docker user namespace issue.

If You Want to Remove LXC Completely

Some servers ship with LXC and LXD preinstalled. If you want a full ubuntu lxcfs disable environment, remove them as well.

First, stop LXCFS:

service lxcfs stop

Then remove all LXC/LXD packages:

apt-get remove lxc-common lxcfs lxd lxd-client

But keep in mind, stopping LXCFS doesn’t auto-unmount the cgroups. You must manually unmount them if you don’t want to reboot:

for i in name=systemd blkio cpu,cpuacct freezer devices net_cls,net_prio perf_event pids hugetlb memory cpuset; do umount /run/lxcfs/controllers/$i; done

umount /var/lxcfs/controllers

And finally, test your Docker setup again:

docker run --rm busybox date

If it prints the time, your system is clean.

Conclusion

Troubleshooting Docker shouldn’t eat your whole day. And with the growing number of Ubuntu users bumping into this conflict, the need for reliable ubuntu lxcfs disable instructions is higher than ever.

So instead of digging through scattered forum posts and outdated threads, this guide gives you the exact steps that actually fix the issue.