LXC, explained.
A short, honest tour of Linux container servers — what they are, what they aren't, and when to pick one.
What LXC is
LXC (Linux Containers) runs a full, isolated Linux userspace on a shared host kernel. From inside your server, it looks and behaves like a regular Linux box: systemd, apt or dnf, cron, SSH, ufw, Docker — all work.
How LXC differs from Docker
Docker containers wrap a single process. LXC containers wrap a full operating system. You can install packages, run multiple services, keep state, and treat it exactly like a small VM.
How LXC differs from KVM
KVM emulates the entire hardware stack, including a per-guest kernel. LXC shares the host kernel — that's why LXC is faster, cheaper and more efficient, and also why you cannot run a custom kernel or Windows on LXC.
When LXC is the right choice
- Websites, blogs, static and dynamic apps
- APIs and microservices
- Discord / Telegram bots and cron workers
- Development and staging environments
- Learning Linux, running a small game server
When you should pick KVM instead
- You need a custom Linux kernel or kernel modules
- You need to run Windows or a non-Linux OS
- You need nested virtualization