Looking back at this 5 years later it seems that I misread the man page. With no options it is supposed to require a kernel image to load and execute. If you just want to execute the already loaded image, you run kexec -e.
** Changed in: kexec-tools (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to kexec-tools in Ubuntu. https://bugs.launchpad.net/bugs/1103493 Title: kexec is broken Status in kexec-tools package in Ubuntu: Invalid Bug description: After loading the new kernel wit kexec -l, the man page says to run kexec without any arguments and it will do a clean shutdown, then kexec. Running kexec without any arguments results in: "No kernel specified" followed by help text. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kexec-tools/+bug/1103493/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp