Command: df -a
Output: Filesystem     1K-blocks  Used Available Use% Mounted on
devtmpfs          108712     0    108712   0% /dev
tmpfs             262144     4    262140   1% /dev/ovl
overlay           262144     4    262140   1% /
devpts                 0     0         0    - /dev/pts
proc                   0     0         0    - /proc
sys                    0     0         0    - /sys
Exit code: 0