During the installation of Ubuntu Server 20.04.1 LTS I chose to use the entire disk as partition (default partitioning that's recommended for beginners, since I don't need any other partitions anyway.
Output of fdisk -l:
Device Start End Sectors Size Type
/dev/nvme0n1p1 2048 1050623 1048576 512M EFI System
/dev/nvme0n1p2 1050624 3147775 2097152 1G Linux filesystem
/dev/nvme0n1p3 3147776 2000406527 1997258752 952.4G Linux filesystemBut when I check with df -h, the biggest partition I have is around 200GB. Where are the rest roughly 750GB that are missing?
Output of df -h:
Filesystem Size Used Avail Use% Mounted on
udev 32G 0 32G 0% /dev
tmpfs 6.3G 1.7M 6.3G 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 196G 12G 175G 7% /
tmpfs 32G 0 32G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 32G 0 32G 0% /sys/fs/cgroup
/dev/nvme0n1p2 976M 104M 805M 12% /boot
/dev/nvme0n1p1 511M 7.8M 504M 2% /boot/efi
/dev/loop1 56M 56M 0 100% /snap/core18/1885
/dev/loop2 71M 71M 0 100% /snap/lxd/16922
/dev/loop0 55M 55M 0 100% /snap/core18/1880
/dev/loop3 30M 30M 0 100% /snap/snapd/8542
/dev/loop4 30M 30M 0 100% /snap/snapd/8790
/dev/loop5 72M 72M 0 100% /snap/lxd/16099
overlay 196G 12G 175G 7% /var/lib/docker/overlay2/33a73507dae561e19ce713e1a10bd44f68b6d231a7d27d7db5c2ae971dae834a/merged
tmpfs 6.3G 0 6.3G 0% /run/user/1000As asked, the output of lsblk:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 55M 1 loop /snap/core18/1880
loop1 7:1 0 55.3M 1 loop /snap/core18/1885
loop2 7:2 0 70.6M 1 loop /snap/lxd/16922
loop3 7:3 0 29.9M 1 loop /snap/snapd/8542
loop4 7:4 0 29.9M 1 loop /snap/snapd/8790
loop5 7:5 0 71.3M 1 loop /snap/lxd/16099
nvme0n1 259:0 0 953.9G 0 disk
├─nvme0n1p1 259:1 0 512M 0 part /boot/efi
├─nvme0n1p2 259:2 0 1G 0 part /boot
└─nvme0n1p3 259:3 0 952.4G 0 part └─ubuntu--vg-ubuntu--lv 253:0 0 200G 0 lvm /Any help is appreciated, thanks in advance!
45 Answers
I also used the default Ubuntu 20.04 install from ISO w/ lvm option selected. I had the same problem with the OS disk not occupying what I had allocated. Eddie's suggestion and the provided link did it for me. To summarize:
root@util:~# vgdisplay
<snip>
root@util:~# lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
<snip>
root@util:~# resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
<snip>Before
root@util:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 795M 1.1M 793M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 98G 6.5G 86G 8% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/xvda2 976M 105M 805M 12% /boot
/dev/loop2 56M 56M 0 100% /snap/core18/1944
/dev/loop0 32M 32M 0 100% /snap/snapd/10707
/dev/loop1 132M 132M 0 100% /snap/docker/796
/dev/loop3 70M 70M 0 100% /snap/lxd/19188
/dev/loop4 33M 33M 0 100% /snap/snapd/11588
/dev/loop5 56M 56M 0 100% /snap/core18/1997
/dev/loop6 71M 71M 0 100% /snap/lxd/19647
tmpfs 795M 0 795M 0% /run/user/1000After
root@util:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 795M 1.1M 793M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 196G 6.5G 180G 4% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/xvda2 976M 105M 805M 12% /boot
/dev/loop2 56M 56M 0 100% /snap/core18/1944
/dev/loop0 32M 32M 0 100% /snap/snapd/10707
/dev/loop1 132M 132M 0 100% /snap/docker/796
/dev/loop3 70M 70M 0 100% /snap/lxd/19188
/dev/loop4 33M 33M 0 100% /snap/snapd/11588
/dev/loop5 56M 56M 0 100% /snap/core18/1997
/dev/loop6 71M 71M 0 100% /snap/lxd/19647
tmpfs 795M 0 795M 0% /run/user/1000I had this problem also. The link below has instructions on how to extend the LVM partition to use all available space.
Not mentioned in the above link is this command to use all remaining space rather than specifying a specific amount to add:
lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lvThe installation is misleading because I specifically selected the option to use all available space, but not all available space was utilized.
1Your root filesystem is on an LVM logical volume (LV) /dev/mapper/ubuntu--vg-ubuntu--lv (196 GB).
The LVM volume group (VG) that provides disk space for that LV probably has one single physical volume (PV), presumably that third partition on that SSD (/dev/nvme0n1p3 with 952.4G).
The VG probably still has a lot of disk space that you could use to make that LV bigger or to create another LV. It might be a disk space allocation strategy of the Ubuntu installer not to simply use all available disk space straight away for the root filesystem, giving you some leeway to decide what to do with the remaining disk space.
You didn't use the "-T" argument to the "df" command, so it doesn't tell the filesystem type; but most modern Linux filesystems have a tool to resize them. ext4 certainly supports that.
Here is a tutorial on the LVM tools:
If you didn't explicitly select using LVM during installation, this might also be a result of choosing encryption; that is typically done via LVM.
HTH
1Just run this command from the terminal:
sudo resize2fs -p /dev/mapper/ubuntu--vg-ubuntu--lv`That did it for me. Then check it with:
df -hYou probably hit the "bug" described in Ubuntu Server Install only uses half of availabe space for root partition
That seems to be by design because they know better than you do. If you want it changed, you'd need to follow the link on that page in the answer to the bug report and tell them they need to reconsider.
