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25.14. Cleaning up the /var/lib/xen/ folder
Over time you will see a number of files accumulate in /var/lib/xen, the usually named vmlinuz.****** and initrd.******. These files are the initrd and vmlinuz files from virtual machines which either failed to boot or failed for some other reason. These files are temporary files extracted from virtual machine's boot disk during the start up sequence. These files should be automatically removed after the virtual machine is shut down cleanly. Then you can safely delete old and stale copies from this directory.