[SOLVED] SD card capacity reduction on Raspberry PI 3B+ with Centos.

So i have 32GB SD card on Raspbery PI 3B+ with Centos 7 installed on it.
However, Linux doesnt see all the space!
Below df -h output:

[root@rpicent1 /]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root       1.4G  1.2G  148M  90% /
devtmpfs        460M     0  460M   0% /dev
tmpfs           464M     0  464M   0% /dev/shm
tmpfs           464M   12M  452M   3% /run
tmpfs           464M     0  464M   0% /sys/fs/cgroup
/dev/mmcblk0p1  667M   43M  625M   7% /boot
tmpfs            93M     0   93M   0% /run/user/1000

And du -sh output:

[root@rpicent1 /]# du -sh
du: cannot access ‘./proc/5357/task/5357/fd/3’: No such file or directory
du: cannot access ‘./proc/5357/task/5357/fdinfo/3’: No such file or directory
du: cannot access ‘./proc/5357/fd/4’: No such file or directory
du: cannot access ‘./proc/5357/fdinfo/4’: No such file or directory
1.3G    .

So basically Linux sees 1,5 GB of space with 32GB sd card in it! I run into some space problems, so i cant move on without resolving it.
Any ideas what might be causing this issue?

I have not tried CentOS on a Pi yet but according to the link below there is a resize tool available. By creating the /.rootfs-repartition file and rebooting the partition should be automatically resized. Let us know how it works.

touch /.rootfs-repartition
systemctl reboot

https://hobo.house/2016/03/03/instal...aspberry-pi-2/

Moved: This thread is more suitable in <Linux - Embedded & Single-board computer > and has been moved accordingly to help your thread/question get the exposure it deserves.

touch /.rootfs-repartition systemctl reboot https://hobo.house/2016/03/03/instal...aspberry-pi-2/

Actually it didn't work.
However, from there i was able to find below instruction which worked perfectly, though it's more manual work:
https://elinux.org/RPi_Resize_Flash_Partitions

Thanks michaelk for this hint!