$ mount rootfs on / type rootfs (rw) ubi0:rootfs on / type ubifs (rw,bulk_read,no_chk_data_crc) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) tmpfs on /tmp type tmpfs (rw,noatime,size=1024k) tmpfs on /var/run type tmpfs (rw,nosuid,noatime,size=256k,mode=755) none on /dev type tmpfs (rw,noatime,size=10240k,mode=755) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noatime,size=65536k) nodev on /sys/kernel/debug type debugfs (0) ~ $ ~ $ df Filesystem 1k-blocks Used Available Use% Mounted on rootfs 233224 214536 14408 94% / ubi0:rootfs 233224 214536 14408 94% / tmpfs 1024 112 912 11% /tmp tmpfs 256 76 180 30% /var/run none 10240 72 10168 1% /dev tmpfs 65536 4 65532 0% /dev/shm ~ $ $ du -kx | sort -n | tail -n 20 1632 ./.opera/pstorage/00/02 1684 ./.opera/pstorage/00 1688 ./.opera/pstorage 3276 ./.osso-abook/avatars 3560 ./.osso-abook/db 3620 ./.cache 3820 ./.rtcom-eventlogger 3912 ./.modest/cache/mail/imap/pamela.atieno__stbeehive.oracle.com_993/folders/INBOX 3924 ./.modest/cache/mail/imap/pamela.atieno__stbeehive.oracle.com_993/folders 3936 ./.modest/cache/mail/imap/pamela.atieno__stbeehive.oracle.com_993 4016 ./.opera 4256 ./.modest/cache/mail/imap 4332 ./.modest/cache/mail 4432 ./.modest/cache 4548 ./.modest7920 ./.local/share/sounds 8000 ./.local 8000 ./.local/share 8304 ./.osso-abook 37152 .