What is mount point in Linux

A mount point in Linux is a location in the directory tree where a filesystem is mounted. In other words, it's a point in the system where additional data is made available from a separate partition or a storage device.

Here are the steps to understand it:

1. In Linux, all files and directories are arranged in a big tree, the root of which is denoted by a slash (/).

2. When you want to access files on a hard drive, CD-ROM, or other storage devices, you need to mount it. Mounting is the process of making a filesystem available to the system.

3. After the storage device is mounted, it's attached to a directory on your system. This directory is called the mount point. It's just an empty directory that is used as a placeholder for the filesystem of the device.

4. Once the device is mounted, you can access its files by navigating to the mount point directory. All files and directories on the device will appear under the mount point directory.

5. For example, if you mount a CD-ROM at /mnt/cdrom, you can access the files on the CD-ROM by going to the /mnt/cdrom directory.

6. You can mount a device manually using the mount command, or the system can do it automatically at startup based on the /etc/fstab file.

7. When you're done using the device, you can unmount it using the umount command. After unmounting, the mount point directory will be empty again.