Error Downloading Packages

[cmdman]

how to fix
 
kloxomr7-7.0.0.b-2015040701.mr.noarch: Insufficient space in download directory /var/cache/yum/x86_64/6/mratwork-release-neutral-noarch/packages
    * free   0
    * needed 6.4 M

[MRatWork]

No space for this directory, inform 'df -h'.

[cmdman]

[root@server packages]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/md1         20G   20G     0 100% /
tmpfs           7.8G     0  7.8G   0% /dev/shm
/dev/md0        283M   33M  236M  13% /boot
/dev/md2        897G   72M  852G   1% /data
[root@server packages]#

[MRatWork]

So, you see that?. Partition root (/) was full where directory /home, /var already in here.