How to increase size of ubuntu-root folder?

Question

linux

Hello.
Raised Ubuntu Server through a virtual box and connected the hard drive as lvm (30 GB)
Faced such a problem:
1) I saw an error that the
df space has ended, it shows that a 314 MB folder (* Ubuntu-root) is locked and 100% of the space in it is occupied.
Trying to set up ansible and there is not enough space to install it.. there is not enough space for anything.
Tell me how to add places to that section? I'm just starting to deal with servers and some questions just lead to a dead end.
I will be very grateful to you

Answer 1

LVM , section "Increasing the size of a logical volume".
PS The folder is the same as the "father", only less formally, and also such a thing for storing pieces of paper.