![]() ![]() See also: Newcastle Connection and Network block device ![]() FreeBSD offers a stronger jail() system call that enables operating-system-level virtualization and also serves security purposes to restrict which files a process may access to just a subset of the file system hierarchy. Chroot is not meant to be used for enhanced security as the processes inside can break out. This is typically done to create a secluded environment to run software that requires legacy libraries and sometimes to simplify software installation and debugging. For most processes this is the same as the system's actual root directory, but it can be changed by calling the chroot system call. In UNIX-like operating systems, each process has its own idea of what the root directory is. All filesystem entries, including mounted filesystems are "branches" of this root. ![]() Though the root directory is conventionally referred to as /, the directory entry itself has no name – its path is the "empty" part before the initial directory separator character ( /). Unix abstracts the nature of this tree hierarchy entirely and in Unix and Unix-like systems the root directory is denoted by the / (slash) sign. ![]()
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