Today I upped the storage on my machine, how ever I'm getting some low space disk errors. The command df -h returns the following:
[caramelo@localhost tmp]$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 9.8G 9.8G 3.6M 100% /
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 18M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/sda1 1014M 221M 794M 22% /boot
SFolder 238G 207G 31G 88% /media/sf_SFolder
tmpfs 380M 4.0K 380M 1% /run/user/42
tmpfs 380M 48K 379M 1% /run/user/1000
tmpfs 380M 0 380M 0% /run/user/0
I used Gparted to expand /dev/sda2/ which is not being displayed in the list above and using du -sh /dev/sda2 returns
[caramelo@localhost ~]$ du -sh /dev/sda2
0 /dev/sda2
To give more storage space I cloned my existing .vdi with vboxmanage clonehd “CentOS7.vdi” “CentOS7Clone.vdi” and then vboxmanage modifyhd –resize 20000 “CentOS7Clone.vdi” and finnaly on VirtualBox Settings I added the cloned .vdi and deattached the original .vdi
Back on CentOS I used the Gparted to expand /dev/sda2 with the unallocated space I added with the vboxmanage modifyhd command.
After I allocated all the free space to sda2 partition, confirmed the changes and reboot the OS I solved the problem using the commands lvextend -l +100%FREE /dev/mapper/centos-root and xfs_growfs /dev/mapper/centos-root