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
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.
nsenter(1),
unshare(1),
clone(2),
getdomainname(2),
gethostname(2),
setns(2),
uname(2),
unshare(2),
namespaces(7)