mount
rootfs on / type rootfs (rw)
/dev/root on /rom type squashfs (ro,relatime)
proc on /proc type proc (rw,noatime)
sysfs on /sys type sysfs (rw,noatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime)
tmpfs on /dev type tmpfs (rw,noatime,size=512k,mode=755)
devpts on /dev/pts type devpts (rw,noatime,mode=600)
/dev/sdb1 on /overlay type ext4 (rw,sync,relatime,user_xattr,barrier=1,data=orde red)
overlayfs:/overlay on / type overlayfs (rw,relatime,lowerdir=/,upperdir=/overlay )
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
none on /proc/bus/usb type usbfs (rw,relatime)
/dev/sda1 on /mnt/sda1 type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered)
df -h
Filesystem Size Used Available Use% Mounted on
rootfs 4.0G 194.7M 3.8G 5% /
/dev/root 5.3M 5.3M 0 100% /rom
tmpfs 61.8M 120.0K 61.7M 0% /tmp
tmpfs 512.0K 0 512.0K 0% /dev
/dev/sdb1 4.0G 194.7M 3.8G 5% /overlay
overlayfs:/overlay 4.0G 194.7M 3.8G 5% /
/dev/sda1 74.4G 21.7G 49.0G 31% /mnt/sda1