Linux findmnt command (find mounted file systems)

Findmnt command will list all mounted filesytems or search for a filesystem. The findmnt command is able to search in /etc/fstab, /etc/fstab.d, /etc/mtab or /proc/self/mountinfo. If device or mountpoint is not given, all filesystems are shown.

Install findmnt

The command findmnt comes in the package util-linux. Findmnt default installed on most distros like Ubuntu, Fedora, Debian.

$ sudo aptitude search util-linux
i   util-linux                      - Miscellaneous system utilities            
p   util-linux:i386                 - Miscellaneous system utilities            
p   util-linux-locales              - Locales files for util-linux

# yum info util-linux-ng
......
Installed Packages
Name        : util-linux-ng
Arch        : x86_64
Version     : 2.17.2
Release     : 12.14.el6
Size        : 5.7 M
Repo        : installed
From repo   : anaconda-CentOS-201311272149.x86_64
Summary     : A collection of basic system utilities
URL         : ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng
License     : GPLv1+ and GPLv2 and GPLv2+ and LGPLv2+ and MIT and BSD with
            : advertising and Public Domain
Description : The util-linux-ng package contains a large variety of low-level
            : system utilities that are necessary for a Linux system to
            : function. Among others, Util-linux contains the fdisk
            : configuration tool and the login program.
......

Using findmnt

This command by default will give you a list of all filesystems mounted if no mountpoint or device is specified.

# findmnt

Example output:

Findmnt list option

If you wish see findmnt output in list format use “-l” option:

# findmnt -l

Example output:

Read file systems from fstab

With the “-s” option read file systems only from the /etc/fstab and /etc/fstab.d.

# findmnt -s

Read file systems from mtab

With the “-m” option read file systems only from the /etc/mtab.

# findmnt -m

Filter filesystems by type

Prints all ext4 file systems currently mounted.(Multiple system types can be specified separated by a comma)

# findmnt -t ext4

That was a little introduction to the findmnt command. For more information about findmnt command see manual page.