PID namespaces : Every running process sees only a limited set of resources. This limited resource set is identified by notion of namespace. In linux kernel for PID namespaces to be enabled CONFIG_PID_NS has to be made true. Network namespaces : Network support at operating system level contains network interface and routing table entries.There resources are typicall shared across entire OS. This typical behaviout can be altered by notion of Network Namespaces. With particular namespce we can isolate acess to network interface and routing table created hitherto. IPC namespace : Message queues, shared memory or socket communication can all be isolated with IPC namespce support provided by operating system MNT namespace : Mount is a process abstration which enables access to storage devices.Notion of mount space enables OS to have isolated filesystems accessible to process that are executing. UTS namespace : UTS stands for UNIX Timesharing Sytem