You could, instead of patching various boot loader config files, add the option by appending some blob to the initrd, containing a linuxrc config file. Say, like: # ll etc/linuxrc.d/10_netiso -rw-r--r-- 1 snwint suse 9 Jul 26 09:57 etc/linuxrc.d/10_netiso # cat etc/linuxrc.d/10_netiso kexec: 1 # find . | cpio -o -H newc | xz --check=crc32 -c >>INITRD