Extend LVM Disk at Ubuntu

https://www.tecmint.com/extend-and-reduce-lvms-in-linux/

https://packetpushers.net/ubuntu-extend-your-default-lvm-space/

Reducing an LVM2 Swap Logical Volume

1. Disable swapping for the associated logical volume:

   # swapoff -v /dev/VolGroup00/LogVol01

2. Reduce the LVM2 logical volume by 512 MB:

   # lvreduce /dev/VolGroup00/LogVol01 -L -512M

3. Format the new swap space:

   # mkswap /dev/VolGroup00/LogVol01

4. Activate swap on the logical volume:

   # swapon -v /dev/VolGroup00/LogVol01

5. To test if the swap logical volume was successfully reduced, inspect active swap space:

   $ cat /proc/swaps
   $ free -h

webmin nginx 500 - error - perl execution failed

Install the below;
sudo apt-get install libwww-perl