[SOLVED] no free space - how to solve it?

Hi! I have a dedicated server with CentOS 6 and CWP.
Today I wake up and realize the websites aren't working properly... and this is the FileSystem resume I got:

Filesystem      Size  Used Avail Use% Mounted on
rootfs            20G   20G     0   100% /
/dev/root        20G   20G     0  100% /
devtmpfs         16G  248K   16G   1% /dev
/dev/md2         91G   25G   62G  29% /home
tmpfs            16G     0   16G   0% /dev/shm
/dev/root        20G   20G     0 100% /var/named/chroot/etc/named
/dev/root        20G   20G     0 100% /var/named/chroot/var/named
/dev/root        20G   20G     0 100% /var/named/chroot/etc/named.conf
/dev/root        20G   20G     0 100% /var/named/chroot/etc/named.rfc1912.zones
/dev/root        20G   20G     0 100% /var/named/chroot/etc/rndc.key
/dev/root        20G   20G     0 100% /var/named/chroot/usr/lib64/bind
/dev/root        20G   20G     0 100% /var/named/chroot/etc/named.iscdlv.key
/dev/root        20G   20G     0 100% /var/named/chroot/etc/named.root.key


As you can see there's no space for /dev/root and for /.. but still space on the disck... how can I solve it??? I need it urgently!!!
Thanks

Hi

Checklist:
Remove Un-wanted data
Auto Backup
Email data
Compress files

Check with filemanager or filezilla and delete file then freeup web space

if need still any clarification, feel free to reply or contact

Hello.

Nobody knows what files you have and what you can remove.

FYI!! It's fixed!

The main problem was the backup dir. I just changed the path to the backups and the problem disappear.