/ is a special case. I did the following:
grub
e
root=/dev/ram0 rw
^X
Wait for mdadm to finish complaining.
alias ll='ls -laF'
mkdir /mnt
lvm pvscan
lvm vgscan
lvm vgchange -a y
e2fsck -f
/var, /usr, /home, and /tmp were all fairly easy to replace live.
/ is a special case. I did the following:
grub e root=/dev/ram0 rw ^X Wait for mdadm to finish complaining. alias ll='ls -laF' mkdir /mnt lvm pvscan lvm vgscan lvm vgchange -a y e2fsck -f /dev/ubuntu-vg/root mount /dev/ubuntu-vg/root /mnt cd /mnt cp -a lib lib65 bin sbin / cd / umount /mnt e2fsck -f /dev/ubuntu-vg/root resize2fs -M /dev/ubuntu-vg/root lvreduce -L 1120M /dev/ubuntu-vg/root e2fsck -f /dev/ubuntu-vg/root resize2fs /dev/ubuntu-vg/root umount -a
http://omnitech.net/reference/2018/03/08/ubuntu-shrink-root/
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