I use the minimal Photon distribution and it seems the system disk is only around 8GB.
That fills up quickly when installing some humongous Docker containers :/
List usage
df -h |

Check available space on disk
fdisk -l |

Install Diskpart
tdnf install parted

Diskpart
parted |

Increase size
resizepart |
print free |

Reboot
reboot |
Resize filesystem
resize2fs /dev/sda2 |
df -h |
And a reboot just for good measure
