What is chroot?

What is chroot?

• A. A network isolation technique
• B. A command that creates a new user namespace
• C. A process that allows you to change the root directory for a running process and its children
• D. A storage mount option

Answer: (C)

Chroot changes the root directory for a running process and all of its descendants, so from inside that process tree the root “/” appears to be the directory you specify. This creates a confined view of the filesystem, often used to run a program in a minimal or legacy environment. It’s not about networks, namespaces, or mounting storage by itself—so it’s not a network isolation technique, it doesn’t create a new user namespace, and it isn’t simply a storage mount option. Remember, chroot is a limited sandbox: it reduces what a process can see in the filesystem, but it isn’t a full security boundary, and escape is possible under certain conditions or configurations, so true isolation typically requires additional mechanisms such as namespaces and containers.

Chroot changes the root directory for a running process and all of its descendants, so from inside that process tree the root “/” appears to be the directory you specify. This creates a confined view of the filesystem, often used to run a program in a minimal or legacy environment. It’s not about networks, namespaces, or mounting storage by itself—so it’s not a network isolation technique, it doesn’t create a new user namespace, and it isn’t simply a storage mount option. Remember, chroot is a limited sandbox: it reduces what a process can see in the filesystem, but it isn’t a full security boundary, and escape is possible under certain conditions or configurations, so true isolation typically requires additional mechanisms such as namespaces and containers.