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RHEL7 Does Not Support User Namespace

The Linux kernel currently implements six (out of 10 proposed) namespaces for process separation: mnt – mount points, filesystems pid – processes net – network stack ipc – System V IPC uts – hostname, domainname user – UIDs, GIDs The last Linux namespace to be fully implemented was the user namespace (CLONE_NEWNS) whose implementation was finally completed in the 3.8 kernel after being started in the 2.6.23 kernel. The current kernel in RHEL7 is 3.10.0-121. Unfortunately it does not include the user namespace. According to Dan Walsh of Red Hat: We hope to add the user namespace support to a