uts_namespaces − overview of Linux UTS namespaces UTS namespaces provide isolation of two system identifiers: the hostname and the NIS domain name. These identifiers are set using and and can be retrieved using and Changes made to these identifiers are visible to all other processes in the same UTS namespace, but are not visible to processes in other UTS namespaces. When a process creates a new UTS namespace using or with the flag, the hostname and domain of the new UTS namespace are copied from the corresponding values in the caller’s UTS namespace. Use of UTS namespaces requires a kernel that is configured with the CONFIG_UTS_NS option. This page is part of release 5.07 of the Linux man‐pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man−pages/.