mtab

For the market research software, see mTAB. For the Swedish railway company, see Malmtrafik.

The mtab (contraction of mounted file systems table) file is a system information file, commonly found on Unix-like systems. This file lists all currently mounted filesystems along with their initialization options. mtab has a lot in common with fstab, the main distinction being that the latter lists all available filesystems whereas the former lists only currently mounted ones. Therefore mtab is usually in a format similar to that of fstab. Most of the time it is possible to directly use lines from mtab in fstab.^[1][2]

The file commonly resides in /etc/mtab.

Sample mtab contents:

 /dev/sdb1 / ext3 rw,relatime,errors=remount-ro 0 0
 proc /proc proc rw,noexec,nosuid,nodev 0 0
 /sys /sys sysfs rw,noexec,nosuid,nodev 0 0
 varrun /var/run tmpfs rw,noexec,nosuid,nodev,mode=0755 0 0
 varlock /var/lock tmpfs rw,noexec,nosuid,nodev,mode=1777 0 0
 udev /dev tmpfs rw,mode=0755 0 0
 devshm /dev/shm tmpfs rw 0 0
 devpts /dev/pts devpts rw,gid=5,mode=620 0 0
 lrm /lib/modules/2.6.24-16-generic/volatile tmpfs rw 0 0
 securityfs /sys/kernel/security securityfs rw 0 0
 gvfs-fuse-daemon /home/alice/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,user=alice 0 0

See also

• df
• fstab

References

1. ^ Mount information
2. ^ mtab manual page