How to Delete OLD Ios from flash memory
Router# delete old IOS image name Delete filename [old IOS image name]? Delete flash: old IOS image name [confirm] Router#
How claim the memory back?
Router# squeeze flash: Squeeze operation may take a while. Continue? [confirm] squeeze in progress... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee Rebuild file system directory... Squeeze of flash complete Router#