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What does bind mounted mean?
A bind mount is an alternate view of a directory tree. Classically, mounting creates a view of a storage device as a directory tree. A bind mount instead takes an existing directory tree and replicates it under a different point. The directories and files in the bind mount are the same as the original.
Does bind mount copy data?
3 Answers. The only ‘problem’ with a bind mount is that it won’t copy the container contents to the host automatically, unlike a named volume.
Where is the mount file in Linux?
Linux stores information about where and how partitions should be mounted in the /etc/fstab file. Linux refers to this file and mounts file systems on devices by automatically running the mount -a command (mount all file systems) each time you boot.
What makes the files in a bind Mount the same?
The directories and files in the bind mount are the same as the original. Any modification on one side is immediately reflected on the other side, since the two views show the same data. the directories /some/where and /else/where have the same content, which is the content of /some/where.
Why does Mount happen over an existing directory?
Most inodes are files or directories. The -i option to ls will list inode numbers. Mounting a filesystem takes a directory inode and sets a flag on the kernel’s in-memory copy to say “actually, when looking for the contents of this directory look at this other filesystem instead” (see slide 10 of this presentation ).
Is it possible to unmount a Linux bind Mount?
A Linux bind mount is mostly indistinguishable from the original. The command df -T /else/where shows the same device and the same filesystem type as df -T /some/where. The files /some/where/foo and /else/where/foo are indistinguishable, as if they were hard links. It is possible to unmount /some/where, in which case /else/where remains mounted.
When to use rbind instead of bind Mount?
The filesystem column can contain none or bind (it’s ignored, but using a filesystem name would be confusing). For example: If there are mount points under /some/where, their contents are not visible under /else/where. Instead of bind, you can use rbind, also replicate mount points underneath /some/where.