Alpine Linux: df -kh

/ # df -kh
Filesystem                Size      Used Available Use% Mounted on
overlay                  20.0G      3.3G     16.7G  17% /
tmpfs                    64.0M         0     64.0M   0% /dev
tmpfs                   962.2M         0    962.2M   0% /sys/fs/cgroup
/dev/nvme0n1p1           20.0G      3.3G     16.7G  17% /etc/hosts
/dev/nvme0n1p1           20.0G      3.3G     16.7G  17% /dev/termination-log
/dev/nvme0n1p1           20.0G      3.3G     16.7G  17% /etc/hostname
/dev/nvme0n1p1           20.0G      3.3G     16.7G  17% /etc/resolv.conf
shm                      64.0M         0     64.0M   0% /dev/shm
tmpfs                     1.4G     12.0K      1.4G   0% /run/secrets/kubernetes.io/serviceaccount
tmpfs                   962.2M         0    962.2M   0% /proc/acpi
tmpfs                    64.0M         0     64.0M   0% /proc/kcore
tmpfs                    64.0M         0     64.0M   0% /proc/keys
tmpfs                    64.0M         0     64.0M   0% /proc/latency_stats
tmpfs                    64.0M         0     64.0M   0% /proc/timer_list
tmpfs                    64.0M         0     64.0M   0% /proc/sched_debug
tmpfs                   962.2M         0    962.2M   0% /sys/firmware

df -kh

Alpine Linux, Red Hat Enterprise Linux CoreOS (RHCOS), apk, Debian slim, Bottlerocket, Busybox