Linux containers are a form of lightweight virtualization that allows for the creation and management of multiple isolated environments within a single host operating system. Each container is a self-contained unit that contains its own file system, network interfaces, and system resources. Containers share the kernel of the host operating system but have their own user space.
Containerization technology has been gaining popularity over the years, and two popular containerization technologies used in Linux are Docker and LXC.
Docker is a platform that simplifies the creation, deployment, and management of applications in containers. Docker uses a layered file system, which allows for efficient use of disk space and fast deployment of containerized applications. Docker containers can be created and deployed quickly and can run on any machine that supports Docker, making it a popular choice for developers.
LXC, or Linux Containers, is an operating system-level virtualization method that uses a Linux kernel to provide container isolation. LXC containers provide resource isolation and allow for running multiple isolated environments on a single Linux host. LXC has been around longer than Docker and is a more flexible and configurable solution, but it requires more manual configuration and setup.
Containerization provides a number of benefits, including better resource utilization, improved portability, and easier maintenance and scaling of applications. It is often used in cloud computing, where large numbers of containers can be deployed and managed on a single host machine.