linux/check/large/files

find / -xdev -type f -size +100M
du -h /usr/ | grep ^[0-9.]*G | sort -nr

http://unix.stackexchange.com/questions/140367/finding-all-large-files-in-the-root-filesystem
https://forums.cpanel.net/threads/diskwarn-var-named-chroot-etc-name-15-76-19-95-gb-83.339451/
https://dev.yorhel.nl/ncdu