Check folder size in Linux Centos

Command : #du -hs /*

To check details folder /etc size :

#du -hs /etc/*
....
32K     /etc/abrt
24K     /etc/acpi
4.0K    /etc/adjtime
4.0K    /etc/aliases
12K     /etc/aliases.db
12K     /etc/alsa
4.0K    /etc/alternatives
....