Linux what file systems are mounted

How to get the complete and exact list of mounted filesystems in Linux?

I usually use mount to check which filesystems are mounted. I also know there is some connection between mount and /etc/mtab but I’m not sure about the details. After reading How to check if /proc/ is mounted I get more confused. My question is: How to get the most precise list of mounted filesystems? Should I just use mount , or read the contents of /etc/mtab , or contents of /proc/mounts ? What would give the most trustworthy result?

I can’t help linking to What is /etc/mtab in Linux? because it covers non-Linux details that none of the answers here give.

5 Answers 5

The definitive list of mounted filesystems is in /proc/mounts .

If you have any form of containers on your system, /proc/mounts only lists the filesystems that are in your present container. For example, in a chroot, /proc/mounts lists only the filesystems whose mount point is within the chroot. (There are ways to escape the chroot, mind.)

There’s also a list of mounted filesystems in /etc/mtab . This list is maintained by the mount and umount commands. That means that if you don’t use these commands (which is pretty rare), your action (mount or unmount) won’t be recorded. In practice, it’s mostly in a chroot that you’ll find /etc/mtab files that differ wildly from the state of the system. Also, mounts performed in the chroot will be reflected in the chroot’s /etc/mtab but not in the main /etc/mtab . Actions performed while /etc/mtab is on a read-only filesystem are also not recorded there.

The reason why you’d sometimes want to consult /etc/mtab in preference to or in addition to /proc/mounts is that because it has access to the mount command line, it’s sometimes able to present information in a way that’s easier to understand; for example you see mount options as requested (whereas /proc/mounts lists the mount and kernel defaults as well), and bind mounts appear as such in /etc/mtab .

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How can you view what file systems are mounted in Linux?

How can you view what file systems are mounted in Linux?

You can use the following commands to see current status of file systems in Linux.

1. mount command. To display information about mounted file systems, enter:
2. df command. To find out file system disk space usage, enter:
3. du Command. Use the du command to estimate file space usage, enter:
4. List the Partition Tables.

What file systems can be mounted in Linux?

As you may already know, Linux supports numerous filesystems, such as Ext4, ext3, ext2, sysfs, securityfs, FAT16, FAT32, NTFS, and many. The most commonly used filesystem is Ext4.

How do I check if a mount point is available?

Using the mount Command One way we can determine if a directory is mounted is by running the mount command and filtering the output. The above line will exit with 0 (success) if /mnt/backup is a mount point.

How do I list all mounted filesystems?

4 Answers. The definitive list of mounted filesystems is in /proc/mounts . If you have any form of containers on your system, /proc/mounts only lists the filesystems that are in your present container.

How do I find my mount options?

To see what options a mounted filesystem is utilizing run the mount command can be ran without any arguments. You can also grep for a particular mount point as sometimes (specially if you are using RHEL/CentOS 7) you might get a huge list of system mount points. For example, data in the below case.

How check NFS mount?

We can use the command nfsstat to find the NFS version of the server/client.

How do I find the default NFS version in Linux?

3 Answers. The nfsstat -c program will show you the NFS version actually being used. If you run rpcinfo -p you will see all the versions of all the RPC programs that the server supports.

How do I know if NFS is running on Linux?

To verify that NFS is running on each computer:

1. AIX® operating systems: Type the following command on each computer: lssrc -g nfs The Status field for NFS processes should indicate active .
2. Linux® operating systems: Type the following command on each computer: showmount -e hostname.

How do I use Showmount in Linux?

showmount Command Examples in Linux

1. showmount command shows information about an NFS server.
2. To get the list of available options and usage of the command:
3. # showmount -h # showmount –help.
4. # showmount -a # showmount –all.
5. # showmount -d 192.168.10.10 # showmount –directories 192.168.10.10.
6. # showmount -e 192.168.10.10 # showmount –exports 192.168.10.10.

How do I export from Linux?

1. Export a directory to remote server. Export a directory to remote server 192.168.
2. List out the exported directories. Executing the exportfs command without any argument displays the exported directories.
3. Unexport a exported directory.
4. Syntax and Options.

What is NAS path in Unix?

Network attached storage (NAS) allows using TCP/IP network to backup files. This is a step-by-step guide on connecting Linux or UNIX systems to SAN for backup or sharing files. The protocol used with NAS is a file-based protocol such as NFS or Microsoft’s Common Internet File System (CIFS).

How do I create a NAS mount?

Use the following procedure to automatically mount an NFS share on Linux systems:

1. Set up a mount point for the remote NFS share: sudo mkdir /var/backups.
2. Open the /etc/fstab file with your text editor : sudo nano /etc/fstab.
3. Run the mount command in one of the following forms to mount the NFS share:

What is NAS file system?

Network-attached storage (NAS) is a file-level storage architecture that makes stored data more accessible to networked devices. NAS gives networks a single access point for storage with built-in security, management, and fault tolerant capabilities.

Is Nas a file system?

Network-attached storage (NAS) is a file-level (as opposed to block-level) computer data storage server connected to a computer network providing data access to a heterogeneous group of clients. They typically provide access to files using network file sharing protocols such as NFS, SMB, or AFP.

What is better SAN or NAS?

SANs are the higher performers for environments that need high-speed traffic such as high transaction databases and ecommerce websites. NAS generally has lower throughput and higher latency because of its slower file system layer, but high-speed networks can make up for performance losses within NAS.

Is synology a NAS or SAN?

Founded in 2000, Synology is a leader in next-generation Network Attached Storage (NAS) servers for home and small-to-medium sized businesses.

Which Synology NAS supports 10GbE?

How do I connect my Synology NAS to my computer?

1. Login to your NAS.
2. Open Control Panel.
3. Open Network.
4. Select Network Interface from the tabs above.
5. Select LAN, click on Edit.
6. and choose manual configuration.
7. you can provide your NDS server (router IP, which you found next to IP settings earlier)

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Linux command to list file systems available for mounting?

What terminal command will return data that includes the file systems that are currently available for mounting on my system? Specifically, I am using Ubuntu 15.04, though I would prefer an answer that is valid for all *nix users. NOTES: I don’t want to know what IS mounted, I want to know what is available. I don’t want to check the type of file system (ext2, ext4, ntsf, etc.), I want to know which file systems are available to be mounted (sda2, fd1, etc.).

Do you mean which filesystems (e.g, ext4, xfs, tmpfs) are available, or what disk devices which potentially contain filesystems (e.g, sdb1, sdd3) are available?

@duskwuff No, I do not mean file system TYPES (ext4, etc.), I mean file systems (which are formatted to a type). Please see CompTIA for clarification of the terms.

What you are describing sounds like storage devices, not file systems. If CompTIA uses the phrase «file systems» to describe this, I’m sorry, but they are wrong.

3 Answers 3

On Ubuntu you can use to show discs:

or to check all partitions on your system

sudo blkid -o list | grep "not mounted" 

or if you just want the device:

sudo blkid -o list | grep "not mounted" | awk '' 

Just to point out, since you edited, the command sudo blkid -o list | grep «not mounted» is the one that was correct.

Regarding the question «command will return data that includes the file systems that are currently available for mounting on my system».

Granted from the powerful PROC file system, the available (or, static + dynamically installed) file systems in a running Linux could be found by:

In my linux 3.10.0, the result is:

$cat /proc/filesystems nodev sysfs nodev rootfs nodev ramfs nodev bdev nodev proc nodev cgroup nodev cpuset nodev tmpfs nodev devtmpfs nodev debugfs nodev securityfs nodev sockfs nodev dax nodev bpf nodev pipefs nodev configfs nodev devpts nodev hugetlbfs nodev autofs nodev pstore . 

This is the meta-data, the «mount» command will find and use.

Then, with below command, it lists all the mounted file systems.

$cat /proc/mounts /dev/sda1 /boot xfs rw,relatime,attr2,inode64,noquota 0 0 . cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0 

The third field of each line, like xfs or cgroup, is the «file system», which is just mentioned in previous command.

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