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[Translated] 20180716 How To Find The Mounted Filesystem Type In Linux.md
Signed-off-by: Chang Liu <liuchang011235@163.com>
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How To Find The Mounted Filesystem Type In Linux
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======
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As you may already know, the Linux supports numerous filesystems, such as Ext4, ext3, ext2, sysfs, securityfs, FAT16, FAT32, NTFS, and many. The most commonly used filesystem is Ext4. Ever wondered what type of filesystem are you currently using in your Linux system? No? Worry not! We got your back. This guide explains how to find the mounted filesystem type in Unix-like operating systems.
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### Find The Mounted Filesystem Type In Linux
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There can be many ways to find the filesystem type in Linux. Here, I have given 8 different methods. Let us get started, shall we?
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#### Method 1 – Using findmnt command
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This is the most commonly used method to find out the type of a filesystem. The **findmnt** command will list all mounted filesystems or search for a filesystem. The findmnt command can be able to search in **/etc/fstab** , **/etc/mtab** or **/proc/self/mountinfo**.
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findmnt command comes pre-installed in most Linux distributions, because it is part of the package named **util-linux**. Just in case if it is not available, simply install this package and you’re good to go. For instance, you can install **util-linux** package in Debian-based systems using command:
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```
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$ sudo apt install util-linux
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```
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Let us go ahead and see how to use findmnt command to find out the mounted filesystems.
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If you run it without any arguments/options, it will list all mounted filesystems in a tree-like format as shown below.
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```
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$ findmnt
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```
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**Sample output:**
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![][2]
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As you can see, the findmnt command displays the target mount point (TARGET), source device (SOURCE), file system type (FSTYPE), and relevant mount options, like whether the filesystem is read/write or read-only. (OPTIONS). In my case, my root(/) filesystem type is EXT4.
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If you don’t like/want to display the output in tree-like format, use **-l** flag to display in simple, plain format.
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```
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$ findmnt -l
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```
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![][3]
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You can also list a particular type of filesystem, for example **ext4** , using **-t** option.
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```
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$ findmnt -t ext4
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TARGET SOURCE FSTYPE OPTIONS
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/ /dev/sda2 ext4 rw,relatime,commit=360
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└─/boot /dev/sda1 ext4 rw,relatime,commit=360,data=ordered
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```
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Findmnt can produce df style output as well.
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```
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$ findmnt --df
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```
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Or
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```
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$ findmnt -D
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```
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Sample output:
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```
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SOURCE FSTYPE SIZE USED AVAIL USE% TARGET
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dev devtmpfs 3.9G 0 3.9G 0% /dev
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run tmpfs 3.9G 1.1M 3.9G 0% /run
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/dev/sda2 ext4 456.3G 342.5G 90.6G 75% /
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tmpfs tmpfs 3.9G 32.2M 3.8G 1% /dev/shm
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tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
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bpf bpf 0 0 0 - /sys/fs/bpf
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tmpfs tmpfs 3.9G 8.4M 3.9G 0% /tmp
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/dev/loop0 squashfs 82.1M 82.1M 0 100% /var/lib/snapd/snap/core/4327
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/dev/sda1 ext4 92.8M 55.7M 30.1M 60% /boot
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tmpfs tmpfs 788.8M 32K 788.8M 0% /run/user/1000
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gvfsd-fuse fuse.gvfsd-fuse 0 0 0 - /run/user/1000/gvfs
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```
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You can also display filesystems for a specific device, or mountpoint too.
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Search for a device:
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```
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$ findmnt /dev/sda1
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TARGET SOURCE FSTYPE OPTIONS
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/boot /dev/sda1 ext4 rw,relatime,commit=360,data=ordered
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```
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Search for a mountpoint:
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```
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$ findmnt /
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TARGET SOURCE FSTYPE OPTIONS
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/ /dev/sda2 ext4 rw,relatime,commit=360
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```
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You can even find filesystems with specific label:
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```
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$ findmnt LABEL=Storage
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```
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For more details, refer the man pages.
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```
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$ man findmnt
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```
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The findmnt command is just enough to find the type of a mounted filesystem in Linux. It is created for that specific purpose only. However, there are also few other ways available to find out the filesystem type. If you’re interested to know, read on.
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#### Method 2 – Using blkid command
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The **blkid** command is used locate and print block device attributes. It is also part of the util-linux package, so you don’t bother to install it.
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To find out the type of a filesystem using blkid command, run:
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```
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$ blkid /dev/sda1
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```
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#### Method 3 – Using df command
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The **df** command is used to report filesystem disk space usage in Unix-like operating systems. To find the type of all mounted filesystems, simply run:
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```
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$ df -T
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```
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**Sample output:**
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![][4]
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For details about df command, refer the following guide.
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Also, check man pages.
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```
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$ man df
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```
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#### Method 4 – Using file command
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The **file** command determines the type of a specified file. It works just fine for files with no file extension.
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Run the following command to find the filesystem type of a partition:
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```
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$ sudo file -sL /dev/sda1
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[sudo] password for sk:
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/dev/sda1: Linux rev 1.0 ext4 filesystem data, UUID=83a1dbbf-1e15-4b45-94fe-134d3872af96 (needs journal recovery) (extents) (large files) (huge files)
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```
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Check man pages for more details:
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```
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$ man file
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```
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#### Method 5 – Using fsck command
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The **fsck** command is used to check the integrity of a filesystem or repair it. You can find the type of a filesystem by passing the partition as an argument like below.
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```
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$ fsck -N /dev/sda1
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fsck from util-linux 2.32
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[/usr/bin/fsck.ext4 (1) -- /boot] fsck.ext4 /dev/sda1
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```
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For more details, refer man pages.
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```
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$ man fsck
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```
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#### Method 6 – Using fstab Command
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**fstab** is a file that contains static information about the filesystems. This file usually contains the mount point, filesystem type and mount options.
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To view the type of a filesystem, simply run:
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```
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$ cat /etc/fstab
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```
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![][5]
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For more details, refer man pages.
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```
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$ man fstab
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```
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#### Method 7 – Using lsblk command
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The **lsblk** command displays the information about devices.
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To display info about mounted filesystems, simply run:
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```
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$ lsblk -f
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NAME FSTYPE LABEL UUID MOUNTPOINT
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loop0 squashfs /var/lib/snapd/snap/core/4327
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sda
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├─sda1 ext4 83a1dbbf-1e15-4b45-94fe-134d3872af96 /boot
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├─sda2 ext4 4d25ddb0-5b20-40b4-ae35-ef96376d6594 /
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└─sda3 swap 1f8f5e2e-7c17-4f35-97e6-8bce7a4849cb [SWAP]
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sr0
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```
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For more details, refer man pages.
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```
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$ man lsblk
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```
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#### Method 8 – Using mount command
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The **mount** command is used to mount a local or remote filesystems in Unix-like systems.
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To find out the type of a filesystem using mount command, do:
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```
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$ mount | grep "^/dev"
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/dev/sda2 on / type ext4 (rw,relatime,commit=360)
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/dev/sda1 on /boot type ext4 (rw,relatime,commit=360,data=ordered)
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```
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For more details, refer man pages.
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```
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$ man mount
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```
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And, that’s all for now folks. You now know 8 different Linux commands to find out the type of a mounted Linux filesystems. If you know any other methods, feel free to let me know in the comment section below. I will check and update this guide accordingly.
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More good stuffs to come. Stay tuned!
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--------------------------------------------------------------------------------
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via: https://www.ostechnix.com/how-to-find-the-mounted-filesystem-type-in-linux/
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作者：[SK][a]
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选题：[lujun9972](https://github.com/lujun9972)
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://www.ostechnix.com/author/sk/
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[1]:data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
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[2]:http://www.ostechnix.com/wp-content/uploads/2018/07/findmnt-1.png
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[3]:http://www.ostechnix.com/wp-content/uploads/2018/07/findmnt-2.png
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[4]:http://www.ostechnix.com/wp-content/uploads/2018/07/df.png
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[5]:http://www.ostechnix.com/wp-content/uploads/2018/07/fstab.png
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@ -0,0 +1,236 @@
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如何在 Linux 中查看已挂载的文件系统类型
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======
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如你所知，Linux 支持非常多的文件系统，例如 Ext4、ext3、ext2、sysfs、securityfs、FAT16、FAT32、NTFS 等等，当前被使用最多的文件系统是 Ext4。你曾经疑惑过你的 Linux 系统使用的是什么类型的文件系统吗？没有疑惑过？不用担心！我们将帮助你。本指南将解释如何在类 Unix 的操作系统中查看已挂载的文件系统类型。
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### 在 Linux 中查看已挂载的文件系统类型
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有很多种方法可以在 Linux 中查看已挂载的文件系统类型，下面我将给出 8 种不同的方法。那现在就让我们开始吧！
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#### 方法 1 – 使用 `findmnt` 命令
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这是查出文件系统类型最常使用的方法。**findmnt** 命令将列出所有已挂载的文件系统或者搜索出某个文件系统。`findmnt` 命令能够在 `/etc/fstab`、`/etc/mtab` 或 `/proc/self/mountinfo` 这几个文件中进行搜索。
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`findmnt` 预装在大多数的 Linux 发行版中，因为它是 **util-linux** 包的一部分。为了防止 `findmnt` 命令不可用，你可以安装这个软件包。例如，你可以使用下面的命令在基于 Debian 的系统中安装 **util-linux** 包：
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```
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$ sudo apt install util-linux
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```
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下面让我们继续看看如何使用 `findmnt` 来找出已挂载的文件系统。
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假如你只敲 `findmnt` 命令而不带任何的参数或选项，它将像下面展示的那样以树状图形式列举出所有已挂载的文件系统。
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```
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$ findmnt
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```
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**示例输出：**
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![][2]
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正如你看到的那样，`findmnt` 展示出了目标挂载点(TARGET)、源设备(SOURCE)、文件系统类型(FSTYPE)以及相关的挂载选项(OPTIONS)，例如文件系统是否是可读可写或者只读的。以我的系统为例，我的根(`/`)文件系统的类型是 EXT4 。
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假如你不想以树状图的形式来展示输出，可以使用 **-l** 选项来以简单平凡的形式来展示输出：
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```
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$ findmnt -l
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```
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![][3]
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你还可以使用 **-t** 选项来列举出特定类型的文件系统，例如下面展示的 **ext4** 文件系统类型：
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```
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$ findmnt -t ext4
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TARGET SOURCE FSTYPE OPTIONS
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/ /dev/sda2 ext4 rw,relatime,commit=360
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└─/boot /dev/sda1 ext4 rw,relatime,commit=360,data=ordered
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```
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`findmnt` 还可以生成 `df` 类型的输出，使用命令
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```
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$ findmnt --df
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```
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或
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```
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$ findmnt -D
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```
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**示例输出：**
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```
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SOURCE FSTYPE SIZE USED AVAIL USE% TARGET
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dev devtmpfs 3.9G 0 3.9G 0% /dev
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run tmpfs 3.9G 1.1M 3.9G 0% /run
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/dev/sda2 ext4 456.3G 342.5G 90.6G 75% /
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tmpfs tmpfs 3.9G 32.2M 3.8G 1% /dev/shm
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tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
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bpf bpf 0 0 0 - /sys/fs/bpf
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tmpfs tmpfs 3.9G 8.4M 3.9G 0% /tmp
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/dev/loop0 squashfs 82.1M 82.1M 0 100% /var/lib/snapd/snap/core/4327
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/dev/sda1 ext4 92.8M 55.7M 30.1M 60% /boot
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tmpfs tmpfs 788.8M 32K 788.8M 0% /run/user/1000
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gvfsd-fuse fuse.gvfsd-fuse 0 0 0 - /run/user/1000/gvfs
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```
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你还可以展示某个特定设备或者挂载点的文件系统类型。
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查看某个特定的设备：
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```
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$ findmnt /dev/sda1
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TARGET SOURCE FSTYPE OPTIONS
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/boot /dev/sda1 ext4 rw,relatime,commit=360,data=ordered
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```
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查看某个特定的挂载点：
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```
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$ findmnt /
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TARGET SOURCE FSTYPE OPTIONS
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/ /dev/sda2 ext4 rw,relatime,commit=360
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```
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你甚至还可以查看某个特定标签的文件系统的类型：
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```
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$ findmnt LABEL=Storage
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```
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更多详情，请参考其 man 手册。
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```
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$ man findmnt
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```
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`findmnt` 命令已足够完成在 Linux 中查看已挂载文件系统类型的任务，这个命令就是为了这个特定任务而生的。然而，还存在其他方法来查看文件系统的类型，假如你感兴趣的话，请接着让下看。
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#### 方法 2 – 使用 `blkid` 命令
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**blkid** 命令被用来查找和打印块设备的属性。它也是 **util-linux** 包的一部分，所以你不必再安装它。
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为了使用 `blkid` 命令来查看某个文件系统的类型，可以运行：
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```
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$ blkid /dev/sda1
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```
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#### 方法 3 – 使用 `df` 命令
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在类 Unix 的操作系统中， **df** 命令被用来报告文件系统的磁盘空间使用情况。为了查看所有已挂载文件系统的类型，只需要运行：
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```
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$ df -T
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```
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**示例输出：**
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![][4]
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关于 `df` 命令的更多细节，可以参考下面的指南。
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- [针对新手的 df 命令教程](https://www.ostechnix.com/the-df-command-tutorial-with-examples-for-beginners/)
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同样也可以参考其 man 手册：
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```
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$ man df
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```
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#### 方法 4 – 使用 `file` 命令
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**file** 命令可以判读出某个特定文件的类型，即便该文件没有文件后缀名也同样适用。
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运行下面的命令来找出某个特定分区的文件系统类型：
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```
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$ sudo file -sL /dev/sda1
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[sudo] password for sk:
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/dev/sda1: Linux rev 1.0 ext4 filesystem data, UUID=83a1dbbf-1e15-4b45-94fe-134d3872af96 (needs journal recovery) (extents) (large files) (huge files)
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```
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查看其 man 手册可以知晓更多细节：
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```
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$ man file
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```
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#### 方法 5 – 使用 `fsck` 命令
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**fsck** 命令被用来检查某个文件系统是否健全或者修复它。你可以像下面那样通过将分区名字作为 `fsck` 的参数来查看该分区的文件系统类型：
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```
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$ fsck -N /dev/sda1
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fsck from util-linux 2.32
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[/usr/bin/fsck.ext4 (1) -- /boot] fsck.ext4 /dev/sda1
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```
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如果想知道更多的内容，请查看其 man 手册：
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```
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$ man fsck
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```
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#### 方法 6 – 使用 `fstab` 命令
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|
||||
**fstab** 是一个包含文件系统静态信息的文件。这个文件通常包含了挂载点、文件系统类型和挂载选项等信息。
|
||||
|
||||
要查看某个文件系统的类型，只需要运行：
|
||||
```
|
||||
$ cat /etc/fstab
|
||||
```
|
||||
|
||||
![][5]
|
||||
|
||||
更多详情，请查看其 man 手册：
|
||||
```
|
||||
$ man fstab
|
||||
```
|
||||
|
||||
#### 方法 7 – 使用 `lsblk` 命令
|
||||
|
||||
**lsblk** 命令可以展示设备的信息。
|
||||
|
||||
要展示已挂载文件系统的信息，只需运行：
|
||||
```
|
||||
$ lsblk -f
|
||||
NAME FSTYPE LABEL UUID MOUNTPOINT
|
||||
loop0 squashfs /var/lib/snapd/snap/core/4327
|
||||
sda
|
||||
├─sda1 ext4 83a1dbbf-1e15-4b45-94fe-134d3872af96 /boot
|
||||
├─sda2 ext4 4d25ddb0-5b20-40b4-ae35-ef96376d6594 /
|
||||
└─sda3 swap 1f8f5e2e-7c17-4f35-97e6-8bce7a4849cb [SWAP]
|
||||
sr0
|
||||
```
|
||||
|
||||
更多细节，可以参考它的 man 手册：
|
||||
```
|
||||
$ man lsblk
|
||||
```
|
||||
|
||||
#### 方法 8 – 使用 `mount` 命令
|
||||
|
||||
**mount** 被用来在类 Unix 系统中挂载本地或远程的文件系统。
|
||||
|
||||
要使用 `mount` 命令查看文件系统的类型，可以像下面这样做：
|
||||
```
|
||||
$ mount | grep "^/dev"
|
||||
/dev/sda2 on / type ext4 (rw,relatime,commit=360)
|
||||
/dev/sda1 on /boot type ext4 (rw,relatime,commit=360,data=ordered)
|
||||
```
|
||||
|
||||
更多详情，请参考其 man 手册的内容：
|
||||
```
|
||||
$ man mount
|
||||
```
|
||||
|
||||
好了，上面便是今天的全部内容了。现在你知道了 8 种不同的 Linux 命令来查看已挂载的 Linux 文件系统的类型。假如你知道其他的命令来完成同样的任务，请在下面的评论部分让我们知晓，我将确认并相应地升级本教程。
|
||||
|
||||
更过精彩内容即将呈现，请保持关注！
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: https://www.ostechnix.com/how-to-find-the-mounted-filesystem-type-in-linux/
|
||||
|
||||
作者：[SK][a]
|
||||
选题：[lujun9972](https://github.com/lujun9972)
|
||||
译者：[FSSlc](https://github.com/FSSlc)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[a]:https://www.ostechnix.com/author/sk/
|
||||
[1]:data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
|
||||
[2]:http://www.ostechnix.com/wp-content/uploads/2018/07/findmnt-1.png
|
||||
[3]:http://www.ostechnix.com/wp-content/uploads/2018/07/findmnt-2.png
|
||||
[4]:http://www.ostechnix.com/wp-content/uploads/2018/07/df.png
|
||||
[5]:http://www.ostechnix.com/wp-content/uploads/2018/07/fstab.png
|
||||
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Reference in New Issue
Block a user