Linux which filesystem type

Command line option to check which filesystem I am using?

Is there a command that will show which file system (ext3, ext4, FAT32, . ) the various partitions and disks are using? Similar to how sudo fdisk -l lists information about disks and partitions?

What do you mean by «similar to» sudo fdisk -l ? . Even when the drive is not mounted, fisk gives you the file system type, and it is a command line tool. I unmounted two of my drives (a USB, and an Internal) and this worked fine: sudo fdisk -l|grep «^/dev»

@fred fdisk says things like «Linux» and «Linux swap», can’t see that it tells me whether it’s ext3 or ext4.

Don’t go by the name;; go by the filesystem Id . if its 83 , fdisk reports it as «Linux , **gpart** as mentioned by Luke Maurer) reports it as **ext2** ,, same thing.. The drives I tested are Ext4 (but were reported as ‘ext2’ and ‘Linux’ by the two apps), but it seems that this identity is a higher abstraction. Whether you really need to go further is up to you. but the **Id** certainly gives you a pretty closes idea. (if you need to know specifically, perhaps ‘gpart in full scan mode will do it. (I havent tried its full scan, but I suspect it won’t say much more (??)..

9 Answers 9

me@hostname:/$ mount /dev/sda1 on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) none on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) 

Except that the disks aren’t mounted — I’m trying to figure out which FS to put in /etc/fstab for a USB external disk

@frabjous Why use Nautilus? Could also just mount it on the command line and then check; this usually works even if you don’t specify the filesystem.

Found a solution in ubuntuforums: blkid

sudo blkid /dev/sda1 /dev/sda1: UUID=". " TYPE="ext4" 
sudo blkid /dev/sdf1 /dev/sdf1: LABEL="backup" UUID=". " TYPE="ext3" 
sudo blkid /dev/md0 /dev/md0: LABEL="raid" UUID=". " TYPE="ext4" 

Mount without specifying filesystem (commenting out any entries in fstab) works as well:

sudo mount /dev/sdf1 /mnt/tmp mount | grep /mnt/tmp /dev/sdf1 on /mnt/tmp type ext3 (rw) 

df -h -T will list all disks used with filesystem type.

This command will also let you query which filesystem is in use for an arbitrary given directory.

For example, the following output shows that the /usr/local/lib directory is on the /dev/xvdb device, and it’s formatted with the ext4 filesystem.

user@disp556:~$ sudo df -h -T /usr/local/lib Filesystem Type Size Used Avail Use% Mounted on /dev/xvdb ext4 2.0G 135M 1.8G 7% /usr/local user@disp556:~$ 

Will give you the filesystem of any attached devices, whether they are mounted or not.

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It also gives you other useful information for creating the needed line for your fstab file such as the UUID.

All of the solutions suggested here are valid, but don’t allow to see if for instance a partition is FAT16 or FAT32. For this level of detail, the best command is

/dev/sdc: DOS/MBR boot sector, code offset 0x58+2, OEM-ID "MSWIN4.1", sectors/cluster 32, Media descriptor 0xf8, sectors/track 63, heads 255, sectors 15794176 (volumes > 32 MB) , FAT (32 bit), sectors/FAT 3856, reserved 0x1, serial number 0x4c437f55, unlabeled 

It’s somewhat overkill, but there’s always gpart . It’s meant for when the partition table is broken, but it does tell you what type all the filesystems it can find are.

EDIT: This doesn’t seem to work if something on the disk is mounted already, though (I just tried it on my running system).

Theoretically, if you just want it to print the partition table, you can use a command like this (from the man page):

But again I can’t try it right now; not sure if it’ll tell you the filesystems if it’s not doing a scan.

I just tried it. I unmounted my «sdb» data drive via Nautilus.. It’s mounpoint directory showed as «Total 0» via «ls -l» and anothe File Browser (PCMan) prompted me to mount it. but even though it wasn’t mounted gpart did return basic partiton information; in particuar, it did show the filesystem

It works, but a bit slower than the other answers — it takes a while to scan a 1TB disk. Still thanks for the pointer to a useful tool, I’m sure gpart will come in handy.

A nice simple tool to find out information about attached devices. and to do backups is the fsarchiver program.

You probably have to install it to use it.

The command I usually use to find out what is on the system is :

 sudo fsarchiver probe simple 

and that comes back with something like :

[======DISK======] [=============NAME==============] [====SIZE====] [MAJ] [MIN] [sda ] [WDC WD1001FALS-0 ] [ 931.51 GB] [ 8] [ 0] [sdb ] [ST31000524AS ] [ 931.51 GB] [ 8] [ 16] [sdg ] [DataTraveler 3.0 ] [ 29.31 GB] [ 8] [ 96] [=====DEVICE=====] [==FILESYS==] [======LABEL======] [====SIZE====] [MAJ] [MIN] [sda1 ] [xfs ] [ ] [ 500.00 MB] [ 8] [ 1] [sda2 ] [LVM2_member] [ ] [ 931.02 GB] [ 8] [ 2] [sdb5 ] [ext4 ] [mydisk_data_01 ] [ 931.51 GB] [ 8] [ 21] [sdg1 ] [vfat ] [KINGSTON ] [ 29.30 GB] [ 8] [ 97] [dm-0 ] [xfs ] [ ] [ 100.00 GB] [253] [ 0] [dm-1 ] [swap ] [ ] [ 34.00 GB] [253] [ 1] [dm-2 ] [xfs ] [ ] [ 797.02 GB] [253] [ 2]

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7 Ways to Determine the File System Type in Linux (Ext2, Ext3 or Ext4)

A file system is the way in which files are named, stored, retrieved as well as updated on a storage disk or partition; the way files are organized on the disk.

A file system is divided in two segments called: User Data and Metadata (file name, time it was created, modified time, it’s size and location in the directory hierarchy etc).

In this guide, we will explain seven ways to identify your Linux file system type such as Ext2, Ext3, Ext4, BtrFS, GlusterFS plus many more.

1. Using df Command

df command reports file system disk space usage, to include the file system type on a particular disk partition, use the -T flag as below:

$ df -Th OR $ df -Th | grep "^/dev"

df Command - Find Filesystem Type

For a comprehensive guide for df command usage go through our articles:

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2. Using fsck Command

fsck is used to check and optionally repair Linux file systems, it can also print the file system type on specified disk partitions.

The flag -N disables checking of file system for errors, it just shows what would be done (but all we need is the file system type):

$ fsck -N /dev/sda3 $ fsck -N /dev/sdb1

fsck - Print Linux Filesystem Type

3. Using lsblk Command

lsblk displays block devices, when used with the -f option, it prints file system type on partitions as well:

lsblk - Shows Linux Filesystem Type

4. Using mount Command

mount command is used to mount a file system in Linux, it can also be used to mount an ISO image, mount remote Linux filesystem and so much more.

When run without any arguments, it prints info about disk partitions including the file system type as below:

Mount - Show Filesystem Type in Linux

5. Using blkid Command

blkid command is used to find or print block device properties, simply specify the disk partition as an argument like so:

blkid - Find Filesystem Type

6. Using file Command

file command identifies file type, the -s flag enables reading of block or character files and -L enables following of symlinks:

file - Identifies Filesystem Type

7. Using fstab File

The /etc/fstab is a static file system info (such as mount point, file system type, mount options etc) file:

Fstab - Shows Linux Filesystem Type

That’s it! In this guide, we explained seven ways to identify your Linux file system type. Do you know of any method not mentioned here? Share it with us in the comments.

Aaron Kili is a Linux and F.O.S.S enthusiast, an upcoming Linux SysAdmin, web developer, and currently a content creator for TecMint who loves working with computers and strongly believes in sharing knowledge.

Each tutorial at TecMint is created by a team of experienced Linux system administrators so that it meets our high-quality standards.

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15 thoughts on “7 Ways to Determine the File System Type in Linux (Ext2, Ext3 or Ext4)”

will create a ext2 filesystem on image1, if its not big enough (warning “Filesystem too small for a journal” means a filesystem without a journal, a.k.a. ext2, is created) If you don’t realize this and nevertheless mount it as ext4. The df and mount methods above will mirror back ext4:

$ df -Th /tmp/mnt* Filesystem Type Size Used Avail Use% Mounted on /dev/loop4 ext4 1003K 24K 908K 3% /tmp/mnt1 /dev/loop5 ext4 987K 33K 812K 4% /tmp/mnt2 $ mount | grep mnt . /home/mallikab/image1 on /tmp/mnt1 type ext4 (rw,relatime,seclabel) /home/mallikab/image2 on /tmp/mnt2 type ext4 (rw,relatime,seclabel,data=ordered)
$ fsck -N /tmp/mnt1 fsck from util-linux 2.23.2 [/sbin/fsck.ext2 (1) -- /tmp/mnt1] fsck.ext2 /tmp/mnt1 $ fsck -N /tmp/mnt2 fsck from util-linux 2.23.2 [/sbin/fsck.ext4 (1) -- /tmp/mnt2] fsck.ext4 /home/mallikab/image2 $ file -sL /home/mallikab/image2 /home/mallikab/image2: Linux rev 1.0 ext4 filesystem data, UUID=b4e8e086-54ca-4d9d-9f38-32bbed211e6b (needs journal recovery) (extents) (64bit) (huge files) $ file -sL /home/mallikab/image1 /home/mallikab/image1: Linux rev 1.0 ext2 filesystem data (mounted or unclean), UUID=09b3a8c9-0b6d-43c5-b195-c45f6c091765 (extents) (64bit) (huge files) hm, although fsck doesn't indicate ext2 unless the images are mounted, i.e. $ fsck -N ~/image1 fsck from util-linux 2.23.2 [/sbin/fsck.ext4 (1) -- /home/mallikab/image1] fsck.ext4 /home/mallikab/image1

The only working method for me was ‘ lsblk -f ‘; the other replied “fuseblk“, “HPFS/NTFS/exFAT” or nothing. Reply

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How to Determine the Filesystem Type in Linux

Determining the filesystem type in Linux can be useful in various scenarios, such as when you want to mount a filesystem, when you want to create a new filesystem, or when you want to format a disk. There are several ways to determine the filesystem type in Linux, such as using the df, mount, or the lsblk command. In this article, we will explore these different ways to determine the filesystem type in Linux.

There are several ways to determine the filesystem type in Linux. Some of the most common ways are:

Method 1: Using the `lsblk` command

The `lsblk` command is a command-line utility that displays information about the block devices on your system, including the filesystem type. To display the filesystem type of a particular block device, you can use the -o option with the lsblk command to specify the information you want to display. For example, to display the filesystem type of the `/dev/sda` block device, you can use the following command:

lsblk -o PATH,FSTYPE,MOUNTPOINT /dev/sda 

This will display the filesystem type of the `/dev/sda` block device.

Output:
PATH FSTYPE MOUNTPOINT /dev/sda /dev/sda1 /dev/sda2 vfat /boot/efi /dev/sda3 ext4 /

To get the details of the specific device like: `/dev/sda3` .

You can also remove the header section from the result with `—noheadings` option. This is helpful for writing the shell scripts.

FS_TYPE=`lsblk -o FSTYPE /dev/sda3 --noheadings` echo $

Method 2: Using the `df` command

The `df` command is a command-line utility that displays information about the filesystems on your system, including the filesystem type. To display the filesystem type of a particular filesystem, you can use the `-T` option with the df command. For example, to display the filesystem type of the `/` filesystem, you can use the following command:

This will display the filesystem type of the / filesystem, as well as other information about the filesystem, such as the total size, used space, and available space.

Output:
Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/sda3 ext4 22010352 10316820 10550136 50% /

Method 3: Using the `mount` command

The mount command is a command-line utility that displays information about the filesystems that are currently mounted on your system, including the filesystem type. To display the filesystem type of a particular filesystem, you can use the mount command without any options. For example, to display the filesystem type of the / filesystem, you can use the following command:

This will display a list of all the mounted filesystems on your system, along with their mount points and filesystem types.

I hope this helps! Let me know if you have any questions.

Conclusion

In conclusion, there are several ways to determine the filesystem type in Linux, such as using the `df` command, the `mount` command, and the `lsblk` command. These utilities provide different ways to display information about the filesystems on your system, including the filesystem type. Understanding how to use these utilities can be helpful in various scenarios when working with filesystems in Linux.

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