The /etc/mtab file is a system-generated file that lists all the currently mounted devices and their mount options. It is updated automatically by the mount and umount commands. It can be used to check which devices are mounted and where, as well as their filesystem type and mount options. The /etc/mtab file has the same format as the /etc/fstab file, which is a user-edited file that lists the devices that should be mounted at boot time or on demand. References:
LPIC-1 Exam 101 Objectives, Topic 101: System Architecture, 101.1 Determine and configure hardware settings, Key Knowledge Areas, The following is a partial list of the used files, terms and utilities: /etc/mtab
LPIC-1 101-500 Exam Prep, Section 1: System Architecture, Lesson 1.1: Determine and Configure Hardware Settings, Video: 1.1.4 Mounting and Unmounting Filesystems, Transcript: The /etc/mtab file is a system-generated file that lists all the currently mounted devices and their mount options.
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