To remove old kernels installed automatically by software-updater, run the below command :

sudo apt autoremove --purge

To remove manually installed kernels use the utility “purge-old-kernels” in package “bikeshed/byobu” in 16.04 LTS

Install “byobu/bikeshed” and run the command “purge-old-kernels” as below :

sudo apt install byobu man purge-old-kernels sudo purge-old-kernels --keep 3 -qy #keep latest THREE kernels & remove others


Refer : http://blog.dustinkirkland.com/2016/06/purge-old-kernels.html


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