Extend free space on ubuntu 20.04 disk

Extend free space on ubuntu 20.04 disk

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.  

Step as below:

user@util:~# sudo vgdisplay
<snip>
user@util:~# sudo lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
<snip>
user@util:~# sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
<snip>

Before

user@util:~# sudo 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/1000

After

user@util:~# sudo 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/1000

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