This is a personal quick-reference for working with LVM (Logical Volume Manager) on Linux. It covers the full lifecycle from creating Physical Volumes through extending Logical Volumes, and finally growing the filesystem on top. ...
Recently I had the issue, that my root partition (/ or slash) was a bit too small for some update. So I had to look up how to resize the root partition. Luckily with LVM/btrfs this works like a charm (if you added enough free space): 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 christian:(hans.heimdaheim.de) PWD:/ Fri Mar 11, 07:02:40 [0] > df -h Filesystem Size Used Avail Use% Mounted on udev 2.0G 4.0K 2.0G 1% /dev tmpfs 396M 428K 395M 1% /run /dev/dm-1 952M 789M 176M 82% / none 4.0K 0 4.0K 0% /sys/fs/cgroup none 5.0M 0 5.0M 0% /run/lock none 2.0G 0 2.0G 0% /run/shm none 100M 0 100M 0% /run/user christian:(hans.heimdaheim.de) PWD:/ Fri Mar 11, 07:02:46 [0] > lvextend /dev/vg0/slash -L2G Extending logical volume slash to 2.00 GiB Logical volume slash successfully resized christian:(hans.heimdaheim.de) PWD:/ Fri Mar 11, 07:04:51 [0] > btrfs filesystem resize max / Resize '/' of 'max' christian:(hans.heimdaheim.de) PWD:/ Fri Mar 11, 07:04:55 [0] > df -h Filesystem Size Used Avail Use% Mounted on udev 2.0G 12K 2.0G 1% /dev tmpfs 396M 440K 395M 1% /run /dev/dm-1 2.0G 647M 1.4G 32% / none 4.0K 0 4.0K 0% /sys/fs/cgroup none 5.0M 0 5.0M 0% /run/lock none 2.0G 0 2.0G 0% /run/shm none 100M 0 100M 0% /run/user