On Mon, Nov 23, 2020 at 5:23 PM Paul Menzel < pmenzel+systemd-de...@molgen.mpg.de> wrote:
> Dear systemd folks, > > > Is an entry for / in `/etc/fstab` still needed, or is there a systemd > way of doing it? > That *is* the systemd way -- the fstab entry will be read by systemd-remount-fs(8) and the new mount options applied. > > Installing Debian bullseye/testing with the Debian Installer, it creates > a GPT and `/etc/fstab`. [...] > Commenting out the entries for `/`, the root partition is mounted as > read-only. > > $ findmnt / > TARGET SOURCE FSTYPE OPTIONS > / /dev/nvme0n1p2 ext4 ro,relatime > > Shouldn’t it be mounted as writable? > No, if you had it initially mounted with 'ro' and did not leave any instructions for remounting, then it won't be remounted... > > $ sudo /lib/systemd/systemd-remount-fs > $ findmnt / > TARGET SOURCE FSTYPE OPTIONS > / /dev/nvme0n1p2 ext4 rw,relatime,errors=remount-ro > > The log says: > > [ 2.320133] systemd[179]: > /usr/lib/systemd/system-generators/systemd-gpt-auto-generator succeeded. > > I can work around it changing `ro` to `rw` on the Linux command line, > but I thought, it is possible without that. > I would say that having the initramfs directly mount the filesystem as rw is the *preferred method*, not a workaround... Of course it depends on how your distro's initramfs wants to work, but at least that's what Arch does -- since fsck is run from the initramfs, there's not much point in later mounting it ro at all. -- Mantas Mikulėnas
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