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change GRUB_DEFAULT=0 in /etc/default/grub to the number that you want, now you need to regenarate the grub2 config using grub2-mkconfig -o /boot/grub2/grub.cfg


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The previous answer should work but thought i'd mention 'Yum-utils' can make this simpler Check what kernels are installed with: rpm -q kernel install yum utils: yum install yum-utils Package cleanup where count is how many kernels you want to retain: package-cleanup --oldkernels --count=2


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With kernel-debug* you means both kernel-debug as well kernel-debuginfo as there is a difference between these two package Kernel-debuginfo: Provides a executable image of the kernel with all the debug symbols Kernel-debug: Enables some debugging code but not have same debug symbols on it ### Excerpt from RedHat Doc ### The kernel-debug enables the ...


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How the change GRUB kernel on redhat 7 version To list all the menu entries that will be displayed at system boot, issue the following command: # awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg 0 : Red Hat Enterprise Linux Server (3.10.0-327.18.2.el7.x86_64) 7.2 (Maipo) 1 : Red Hat Enterprise Linux Server (3.10.0-327.10.1.el7.x86_64) 7.2 ...


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Alright. I have to answer this question before anyone else. I followed this tutorial. http://blog.3mdeb.com/2015/12/30/emulate-rapberry-pi-2-in-qemu/ The key is that Changing ld.so.preload Then it boots. Then I think I can do a lot things using qemu new.sh. Here's the commands: /usr/local/src/qemu-2.6.0/bin/debug/native/arm-softmmu/qemu-system-arm \ ...



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