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====== Ubuntu - Filesystem - Determine File Systems Type ======

===== Using dt =====


<code bash>
df -T /
</code>

result:

<code bash>
Filesystem                  Type  1K-blocks       Used Available Use% Mounted on
/dev/mapper/ubuntu--vg-root ext4 1920299296 1659133892 163549740  92% /
</code>

----

===== Using fsck =====

<code bash>
fsck -N /
</code>

result:

<code bash>
fsck from util-linux 2.31.1
[/sbin/fsck.ext4 (1) -- /] fsck.ext4 /dev/mapper/ubuntu--vg-root 
</code>


----

===== Using lsblk =====

The **lsblk** command is used for displaying the block devices in a Linux machine.  You can add the **-f** flag for telling lsblk to show the file system type.

<code bash>
lsblk -f
</code>

result:

<code bash>
NAME                  FSTYPE      LABEL UUID                                   MOUNTPOINT
loop0                 squashfs                                                 /snap/core/7917
loop1                 squashfs                                                 /snap/gnome-characters/359
loop2                 squashfs                                                 /snap/netbeans/18
loop3                 squashfs                                                 /snap/pycharm-community/167
loop4                 squashfs                                                 /snap/core18/1265
loop5                 squashfs                                                 /snap/core/8039
loop6                 squashfs                                                 /snap/gnome-3-26-1604/97
loop7                 squashfs                                                 /snap/gnome-3-28-1804/91
loop8                 squashfs                                                 /snap/core18/1223
loop9                 squashfs                                                 /snap/gtk-common-themes/1313
loop10                squashfs                                                 /snap/gnome-calculator/536
loop11                squashfs                                                 /snap/gnome-3-28-1804/110
loop12                squashfs                                                 /snap/pycharm-community/163
loop13                squashfs                                                 /snap/gnome-characters/367
loop14                squashfs                                                 /snap/gnome-system-monitor/111
loop15                squashfs                                                 /snap/gnome-3-26-1604/98
loop16                squashfs                                                 /snap/gnome-logs/73
loop17                squashfs                                                 /snap/gtk-common-themes/1353
loop18                squashfs                                                 /snap/gnome-system-monitor/107
loop19                squashfs                                                 /snap/gnome-logs/81
loop20                squashfs                                                 /snap/netbeans/10
loop21                squashfs                                                 /snap/gnome-calculator/544
sda                                                                            
├─sda1                vfat              6FE9-28C1                              /boot/efi
└─sda2                LVM2_member       CbUWCI-RGrO-xTVQ-mrNL-YVHf-k8aq-ueMTgd 
  ├─ubuntu--vg-root   ext4              dcf9c103-2998-4698-aec6-b524aa1db1f0   /
  └─ubuntu--vg-swap_1 swap              618aa54e-e6f1-4c22-826d-23bd981be108   [SWAP]
</code>


----

===== Using mount =====

<code bash>
mount | grep "^/dev"
</code>

result:

<code bash>
/dev/mapper/ubuntu--vg-root                         on      /                                                                                                       type                                 ext4             (rw,relatime,errors=remount-ro,data=ordered)
/dev/sda1                                           on      /boot/efi                                                                                               type                                 vfat             (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
</code>


----

===== Using blkid =====

<code bash>
blkid /dev/sda1
</code>

result:

<code bash>
/dev/sda1: UUID="6FE9-28C1" TYPE="vfat" PARTUUID="8e53314c-0814-46cd-9f13-c2bb2b7a14b6"
</code>


----

===== Using file =====

<code bash>
sudo file -sL /dev/sda1
</code>

result:

<code bash>
/dev/sda1: DOS/MBR boot sector, code offset 0x58+2, OEM-ID "mkfs.fat", sectors/cluster 8, Media descriptor 0xf8, sectors/track 63, heads 255, hidden sectors 2048, sectors 1048576 (volumes > 32 MB), FAT (32 bit), sectors/FAT 1024, reserved 0x1, serial number 0x6fe928c1, unlabeled
</code>


----

===== Using fstab =====

<code bash>
cat /etc/fstab
</code>

result:

<code bash>
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/ubuntu--vg-root /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda1 during installation
UUID=6FE9-28C1  /boot/efi       vfat    umask=0077      0       1
/dev/mapper/ubuntu--vg-swap_1 none            swap    sw              0       0
</code>

----

===== Using parted =====

<code bash>
sudo parted -l
</code>

result:

<code bash>
Model: ATA CT2000MX500SSD1 (scsi)
Disk /dev/sda: 2000GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name  Flags
 1      1049kB  538MB   537MB   fat32              boot, esp
 2      538MB   2000GB  2000GB                     lvm


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/ubuntu--vg-swap_1: 1023MB
Sector size (logical/physical): 512B/4096B
Partition Table: loop
Disk Flags: 

Number  Start  End     Size    File system     Flags
 1      0.00B  1023MB  1023MB  linux-swap(v1)


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/ubuntu--vg-root: 1999GB
Sector size (logical/physical): 512B/4096B
Partition Table: loop
Disk Flags: 

Number  Start  End     Size    File system  Flags
 1      0.00B  1999GB  1999GB  ext4
</code>


----

===== Using mtab =====

<code bash>
cat /etc/mtab | grep "/dev/sd*"
</code>

result:

<code bash>
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
/dev/sda1 /boot/efi vfat rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0
</code>