![]() Essentially, any environment that needs to scale can benefit from the security and reliability of an immutable OS. Immutable systems are particularly useful in environments where security is a top priority, such as cloud computing, embedded systems, kiosks, and container execution. ![]() In an immutable OS, however, any command that attempts to modify the system files will fail, as those files are only accessible for reading. If you’re already a Linux user, you’ll know that as root (Administrator), you can write anywhere in the filesystem, potentially corrupting the OS portion responsible for booting or management. You can also find a very good writeup by Adrian Hornsby here. Any updates or changes are made by creating a new instance of the OS, deploying it, and switching over to the new instance. Think of it as a snapshot of a standard Linux system that cannot be changed. Any changes made to the system are temporary and lost when the system is rebooted. ![]() This means that once the operating system has been installed, the system files and directories cannot be modified. However, we’ll simplify it here as much as possible, even for those unfamiliar with the concepts.įormally defined, an immutable Linux OS (also known as Immutable Infrastructure or Immutable Deployment) is an operating system designed to be unchangeable and read-only. ![]() So, get ready to dive in! What is an Immutable Linux OS?Įxplaining the concept of an immutable Linux OS to a newcomer can often turn into a detailed discussion on system internals. We’ll also be exploring the various solutions available and the challenges faced in this field. In this post, we’ll be addressing some common questions to help you understand the principles behind immutable operating systems. An illustration of a fortress surrounded by a moat and guarded by armored knights, with a banner flying the Linux penguin logo, medieval, fortified, secure, trending on Artstation. ![]()
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