Understanding the /etc/mtab File | Baeldung on Linux
https://www.baeldung.com/linux/etc-mtab-file
WebMar 18, 2024 · The /etc/mtab file contains the currently mounted filesystems. It’s used by the mount and umount commands to mount, list, and unmount the volumes. The content structure of the mtab file is similar to the /etc/fstab file. However, the mtab file is not used by the kernel, which maintains its own list, i.e., /proc/mounts and /proc/self/mounts.
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