Linux disk is full, quickly find and clean up space

du -sh *

 

[root@yang /]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/vda1              40G   38G     0 100% /
tmpfs                 3.9G   12K  3.9G   1% /dev/shm
[root@yang /]# du -sh *
6.5M    bin
149M    boot
36K     cgroup
44G     data
156K    dev
28M     etc
6.9M    home
639M    lib
22M     lib64
4.0K    media
4.0K    mnt
2.0G    opt