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If you have a 2nd (non-headless) machine nearby, and an available serial port on each of your machines, and a null-modem (serial console) cable, you can tell grub (and optionally the kernel) to output to serial console. And then use your 2nd machine to select which OS you want to boot from the grub menu. Even though it's not specifically for CentOS, the Arch ...


As long as you don't need older packages that 16.04 brings or some other quirks, you should use the latest stable version available. It comes with newer software packages in the standard repositories. This affects maintenance and flexibility of the environments. There's also a newer kernel. The support time is longer - this applies to LTS versions (both 18....

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