chroot
Unix-like operating system command
chroot is an operation on Unix and Unix-like operating systems that changes the apparent root directory for the current running process and its children. A program that is run in such a modified environment cannot name files outside the designated... Wikipedia
Function: Change root directory to the supplied directory newroot and executes command, if supplied, or an interactive copy of the user's shell
Developer(s): Various open-source and commercial developers
Initial release: 1979; 45 years ago
Original author(s): Bill Joy, AT&T Bell Laboratories