Chris Murphy wrote:
Live CD does not have a troubleshoot boot sub menu option.
If I boot into CentOS-7-x86_64-LiveKDE-1503.iso there is a Troubleshooting option, and if I choose this there is an option to "Boot into Local Disk". Clicking on this gives a list of OS's to boot into.
It seems this does run through all partitions, running os-prober on each. I thought os-prober was an object file, but I see it is a bash script, so hopefully I can see exactly what it does.