focal (7) uts_namespaces.7.gz

NAME

       uts_namespaces - overview of Linux UTS namespaces

DESCRIPTION

       UTS  namespaces provide isolation of two system identifiers: the hostname and the NIS domain name.  These
       identifiers are set using sethostname(2) and setdomainname(2),  and  can  be  retrieved  using  uname(2),
       gethostname(2),  and  getdomainname(2).   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 clone(2) or unshare(2) 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), unshare(1),  clone(2),  getdomainname(2),  gethostname(2),  setns(2),  uname(2),  unshare(2),
       namespaces(7)

COLOPHON

       This  page  is  part  of  release  5.05  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/.