# phpman > info > uts_namespaces

[UTS_NAMESPACES(7)](https://www.chedong.com/phpMan.php/man/UTSNAMESPACES/7/markdown)          Linux Programmer's Manual         [UTS_NAMESPACES(7)](https://www.chedong.com/phpMan.php/man/UTSNAMESPACES/7/markdown)

NAME
       uts_namespaces - overview of Linux UTS namespaces

DESCRIPTION
       UTS  namespaces  provide isolation of two system identifiers: the host-
       name and the NIS domain name.  These identifiers are set using sethost-
       [name(2)](https://www.chedong.com/phpMan.php/man/name/2/markdown)  and  [setdomainname(2)](https://www.chedong.com/phpMan.php/man/setdomainname/2/markdown),  and  can  be retrieved using [uname(2)](https://www.chedong.com/phpMan.php/man/uname/2/markdown),
       [gethostname(2)](https://www.chedong.com/phpMan.php/man/gethostname/2/markdown), and [getdomainname(2)](https://www.chedong.com/phpMan.php/man/getdomainname/2/markdown).  Changes made  to  these  identi-
       fiers 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 [clone(2)](https://www.chedong.com/phpMan.php/man/clone/2/markdown) or [unshare(2)](https://www.chedong.com/phpMan.php/man/unshare/2/markdown)
       with  the  CLONE_NEWUTS  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.

SEE ALSO
       [nsenter(1)](https://www.chedong.com/phpMan.php/man/nsenter/1/markdown),  [unshare(1)](https://www.chedong.com/phpMan.php/man/unshare/1/markdown),  [clone(2)](https://www.chedong.com/phpMan.php/man/clone/2/markdown),  [getdomainname(2)](https://www.chedong.com/phpMan.php/man/getdomainname/2/markdown),  [gethostname(2)](https://www.chedong.com/phpMan.php/man/gethostname/2/markdown),
       [setns(2)](https://www.chedong.com/phpMan.php/man/setns/2/markdown), [uname(2)](https://www.chedong.com/phpMan.php/man/uname/2/markdown), [unshare(2)](https://www.chedong.com/phpMan.php/man/unshare/2/markdown), [namespaces(7)](https://www.chedong.com/phpMan.php/man/namespaces/7/markdown)

COLOPHON
       This  page  is  part of release 5.10 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/>.

Linux                             2019-11-19                 [UTS_NAMESPACES(7)](https://www.chedong.com/phpMan.php/man/UTSNAMESPACES/7/markdown)