System Storage Manager provides an easy to use command line interface to manage your storage using various technologies like lvm, btrfs, encrypted volumes and more.
Today I will show an easy way to fix the size of your size of the volume and the file system.
Fist you need to install it with dnf tool :
[root@desk mythcat]# dnf install system-storage-manager
Last metadata expiration check: 1:11:16 ago on Thu 08 Nov 2018 08:04:29 PM EET.
Package system-storage-manager-1.2-1.fc29.noarch is already installed.
Dependencies resolved.
Nothing to do.
Complete!
Use this command to fill up to 100%:[root@desk mythcat]# ssm resize -s +100%FREE /dev/mapper/fedora-root
Display the information about all detected devices, pools, volumes, and snapshots, see:[root@desk mythcat]# ssm list
-------------------------------------------------------------
Device Free Used Total Pool Mount point
-------------------------------------------------------------
Check the file system consistency on the volume ( this cannot be use with swap ).[root@desk mythcat]# ssm check
You can read more about this tool here.