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TODO: develop procedure for renaming the volume group and document here (when / is on LVM as ours normally are, this may require rebuilding the initial RAM disk, re-configuring the boot manager, editing fstab ...). Maybe useful links: https://we.riseup.net/debian/renaming-a-lvm-root-volume-group, https://bugzilla.redhat.com/show_bug.cgi?id=230190#c17 (RedHat),
TODO: is any postfix re-configuration required?
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