/dev/mapper/rhel-root is already mounted as it's the root directory, so I tried to do experiment by mounting it again to another mountpoint.
Any difference between these two?
mount /dev/mapper/rhel-root <mountpoint A>
mount --bind / <mountpoint A>
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1Well, the second works fine, the first will most probably wreck your filesystem. – Gerald Schneider Sep 07 '20 at 05:53
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mount --bind isn't limited to mountpoints which is its main advantage over a bare mount.
In this situation I'd use the bare mount since the bind would offer no advantages and might even be hassle in the long run.
Ginnungagap
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