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uts_namespaces.7: New page with content migrated from namespaces(7)
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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.\" Copyright (c) 2019 by Michael Kerrisk <mtk.manpages@gmail.com>
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.\"
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.\" %%%LICENSE_START(VERBATIM)
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" %%%LICENSE_END
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.\"
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.\"
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.TH UTS_NAMESPACES 7 2019-08-02 "Linux" "Linux Programmer's Manual"
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.SH NAME
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namespaces \- overview of Linux UTS namespaces
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.SH DESCRIPTION
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UTS namespaces provide isolation of two system identifiers:
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the hostname and the NIS domain name.
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These identifiers are set using
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.BR sethostname (2)
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and
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.BR setdomainname (2),
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and can be retrieved using
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.BR uname (2),
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.BR gethostname (2),
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and
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.BR getdomainname (2).
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.PP
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.PP
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When a process creates a new UTS namespace using
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.BR clone (2)
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or
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.BR unshare (2)
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with the
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.BR CLONE_NEWUTS
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flag, the hostname and domain of the new UTS namespace are copied
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from the corresponding values in the caller's UTS namespace.
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.PP
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Use of UTS namespaces requires a kernel that is configured with the
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.B CONFIG_UTS_NS
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option.
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.SH SEE ALSO
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.BR nsenter (1),
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.BR unshare (1),
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.BR clone (2),
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.BR setns (2),
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.BR unshare (2),
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.BR namespaces (7)
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