Ubuntu disk space is insufficient to clean up the boot partition

  
                

When Ubuntu upgrades, there is an error message about insufficient disk space. This is to clean up the boot partition. The following small series will introduce you to Ubuntu to clean up the boot partition.

problem

Ubuntu update time, reported an error:

Because I boot divided 256m, kernel installed on the boot partition, so I need to clean up the boot partition

View the system's existing kernel

dpkg --get-selections

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