Can't remove packages, no enough space. please help

Hello, there is an error message indicating no space when i try to remove packages. i have 2 gb ram in my router.
For exam

``Removing package luci-i18n-unblockmusic-zh-cn from root...

rm: can't remove '/etc/rc.d/K10unblockmusic': No space left on device

my df looks like:

A post was merged into an existing topic: Can't find luci packages in web interface