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I'm troubleshooting an issue where CentOS stops at "Reached target Shutdown" when I issue a reboot command. In other words the system does not reboot but remains as is after printing the mentioned message.
I've enabled the debug shell using:
systemctl enable debug-shell.service
On reaching the Shutdown target I see that I am still able to access the filesystem using ls, pwd etc. from the debug shell implying that the filesystem was not unmounted. Does this mean the debug shell service has somehow prevented filesystems from unmounting? If so, how do I run a debug shell without circumventing filesystem unmount?