systemd-remount-fs.servicetitle> <productname>systemdproductname> <authorgroup> <author> <contrib>Developercontrib> <firstname>Lennartfirstname> <surname>Poetteringsurname> <email>lennart@poettering.netemail> author> authorgroup> refentryinfo> <refmeta> <refentrytitle>systemd-remount-fs.servicerefentrytitle> <manvolnum>8manvolnum> refmeta> <refnamediv> <refname>systemd-remount-fs.servicerefname> <refname>systemd-remount-fsrefname> <refpurpose>Remount root and kernel file systemsrefpurpose> refnamediv> <refsynopsisdiv> <para><filename>systemd-remount-fs.servicefilename></para> <para><filenameusr/lib/systemd/systemd-remount-fs</filename></para> refsynopsisdiv> <refsect1> <title>Descriptiontitle> <para><filename>systemd-remount-fs.servicefilename> is an early boot service that applies mount options listed in <citerefentry project='man-pages'><refentrytitle>fstabrefentrytitle><manvolnum>5</manvolnum></citerefentry> to the root file system, the <filenameusr</filename> file system, and the kernel API file systems. This is required so that the mount options of these file systems — which are pre-mounted by the kernel, the initial RAM disk, container environments or system manager code — are updated to those listed in <filenameetc/fstab</filename>. This service ignores normal file systems and only changes the root file system (i.e. <filename</filename>), <filename>/usr</filename> and the virtual kernel API file systems such as <filenameproc</filename>, <filenamesys</filename> or <filename>/dev</filename>. This service executes no operation if <filenameetc/fstab</filename> does not exist or lists no entries for the mentioned file systems.para> <para>For a longer discussion of kernel API file systems see <ulink url="http/www.freedesktop.org/wiki/Software/systemd/APIFileSystems">API File Systemsulink>.</para> refsect1> <refsect1> <title>See Alsotitle> <para> <citerefentry><refentrytitle>systemdrefentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry project='man-pages'><refentrytitle>fstabrefentrytitle><manvolnum>5</manvolnum></citerefentry>, <citerefentry project='man-pages'><refentrytitle>mountrefentrytitle><manvolnum>8</manvolnum></citerefentry> para> refsect1> refentry>