What does the command mount -a do?
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A. B. C. D. E.D
The correct answer is E. The command mount -a ensures that all file systems listed in /etc/fstab are mounted regardless of their options.
Here's a more detailed explanation of the command:
The mount command is used to mount file systems. When a file system is mounted, it is made accessible to the operating system and its users. A file system can be mounted manually using the mount command or automatically at system boot time using the /etc/fstab file.
The /etc/fstab file contains information about file systems that are to be mounted automatically at system boot time. It specifies the device name, mount point, file system type, and mount options for each file system. Mount options specify how the file system should be mounted, such as read-only or read-write.
The mount -a command is used to mount all file systems listed in /etc/fstab. It reads the /etc/fstab file and mounts each file system listed in it. The -a option tells the mount command to mount all file systems that are listed in /etc/fstab.
This command is often used after making changes to /etc/fstab, such as adding a new file system or changing the mount options for an existing file system. Running mount -a after making changes ensures that all file systems are mounted with the correct options.
In summary, the mount -a command is used to mount all file systems listed in /etc/fstab regardless of their mount options.