Linux namespaces are somewhat like Solaris zones in many ways from a user perspective but have significant differences under the hood. The term namespace isolation is often used because the purpose of namespaces is to provide a group of processes with the illusion that that they are the only processes on the system. This is an important requirement for implementing Linux Containers. Namespaces were developed over a number of years by Eric W. Biederman (user namespaces), Pavel Emelyanov, Al Viro, Cyrill Gorcunov, et al. Six user namespaces (out of 10 proposed) are implemented in RHEL7: mnt – mount points, filesystems
