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For questions concerning the elementary OS kernel (which is the same as Ubuntu's kernel), including compiling, and questions relating to modules

13 votes

How to remove old kernel versions?

You can use this one-liner to automatically clean up all old kernels (make sure to restart the computer before doing this if you have just updated the kernel): sudo apt purge $( dpkg --list | grep -P … the installed packages (dpkg --list) whose names match "linux-headers-[number]" or "linux-image-[number]" (grep -P -o "linux-(headers|image)-\d\S+"), except (grep -v) those corresponding to the current kernel
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