97 lines
2.6 KiB
HTML
97 lines
2.6 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of SYSTEMD-MACHINE-ID-COMMIT.SERVICE</TITLE>
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</HEAD><BODY>
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<H1>SYSTEMD-MACHINE-ID-COMMIT.SERVICE</H1>
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Section: systemd-machine-id-commit.service (8)<BR>Updated: <BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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systemd-machine-id-commit.service - Commit a transient machine ID to disk
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<P>
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systemd-machine-id-commit.service
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<P>
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systemd-machine-id-commit.service
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is an early boot service responsible for committing transient
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/etc/machine-id
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files to a writable disk file system. See
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<B><A HREF="/cgi-bin/man/man2html?5+machine-id">machine-id</A></B>(5)
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for more information about machine IDs.
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<P>
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This service is started after
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local-fs.target
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in case
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/etc/machine-id
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is a mount point of its own (usually from a memory file system such as
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"tmpfs") and /etc is writable. The service will invoke
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<B>systemd-machine-id-setup --commit</B>, which writes the current transient machine ID to disk and unmount the
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/etc/machine-id
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file in a race-free manner to ensure that file is always valid and accessible for other processes. See
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<B><A HREF="/cgi-bin/man/man2html?1+systemd-machine-id-setup">systemd-machine-id-setup</A></B>(1)
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for details.
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<P>
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The main use case of this service are systems where
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/etc/machine-id
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is read-only and initially not initialized. In this case, the system manager will generate a transient machine ID file on a memory file system, and mount it over
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/etc/machine-id, during the early boot phase. This service is then invoked in a later boot phase, as soon as
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/etc
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has been remounted writable and the ID may thus be committed to disk to make it permanent.
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<A NAME="lbAE"> </A>
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<H2>SEE ALSO</H2>
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<P>
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<B><A HREF="/cgi-bin/man/man2html?1+systemd">systemd</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?1+systemd-machine-id-setup">systemd-machine-id-setup</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?5+machine-id">machine-id</A></B>(5),
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<B><A HREF="/cgi-bin/man/man2html?1+systemd-firstboot">systemd-firstboot</A></B>(1)
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="3"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="4"><A HREF="#lbAE">SEE ALSO</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:06:16 GMT, March 31, 2021
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</BODY>
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</HTML>
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