To delete unused images, conduct the following steps.
Get a list of the unused images.
switch (config) # show images Installed images: Partition 1: version: image-X86_64-3.6.5000.img Partition 2: version: image-X86_64-3.6.5000.img Last boot partition: 1 Next boot partition: 1 Images available to be installed: No image files are available to be installed. Serve image files via HTTP/HTTPS: no No image install currently in progress. Boot manager password is set. Image signing : trusted signature always required Admin require signed images: yes Settings for next boot only: Fallback reboot on configuration failure: yes (default)Delete the unused images.
switch (config) # image delete image-X86_64-3.9.1302.img
When deleting an image, it is recommended to delete the file, but not the partition, so as to not overload system resources.
