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Todo o mundo A chroot on Unix operating systems is an operation that changes the apparent root directory for the current running process and its children. The programs that run in this modified environment cannot access the files outside the designated directory tree. This essentially limits their access to a directory tree and thus they get the name "chroot jail".
The idea is that you create a directory tree where you copy or link in all the system files needed for a process to run. You then use the chroot system call to change the root directory to be at the base of this new tree and start the process running in that chrooted environment. Since it can't actually reference paths outside the modified root, it can't maliciously read or write to those locations.
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