Linux list mount points

Linux Command: Show Mounted Hard Drives Partition

[a] df command – Shoe file system disk space usage.

Tutorial details
Difficulty level	Easy
Root privileges	No
Requirements	Linux
Est. reading time	N/A

[b] mount command – Show all mounted file systems. [c] /proc/mounts or /proc/self/mounts file – Show all mounted file systems.

Examples

Open a terminal or login using ssh into the remote server and type the following command:
$ cat /proc/mounts
OR
$ cat /proc/self/mounts
Sample outputs:

Type the mount command as follows to get same information:

Type the df command shows more human readable output:

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Fig.01: df command in action

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Comments on this entry are closed.

command not found…

Which command will display the number of devices in my system (routers/switches/AP)

I purchased the Hp 15-n018 model laptop, when i checking with vendor they said will not support for Linux operating and i didn’t found the driver in internet….. i able found in win 8 and 8.1….
But am very interested in Linux operating system…. any one can please help me where i can the driver.

Sudinhar: it really depends on what driver you’re talking about for which specific device and for which specific Linux distribution.
The laptop itself may require any number of drivers, including HD, CD/DVD, sound, display, network, etc.
Many Linux distributions come with drivers for a wide variety of systems & devices, and you can generally get Linux up & running on just about anything these days with enough patience.
You can generally repartition your hard drive without losing any data using tools provided in distribution ISOs/DVDs & install Linux as a dual boot without fear of not being able to also use Windows if necessary as a backup.
I first installed Linux on a laptop back in the 90s, and it was difficult to get all the drivers but I did eventually & it worked ok.
These days it’s usually much simpler and any up to date Linux distribution should run just fine on your laptop with a little setup & TLC.

As a side note, I’d like to thank the author of this article, the commands worked as advertised & provided the information I required.

Linux has a long history of not “playing well” with laptops, and unless you get a laptop that is “certified” to run with Linux, you’re bound to have headaches. Something else you might try is keeping the laptop as is, and installing Virtual Box, by Sun (Oracle?) I believe it’s available on-line at no charge. This is a VM system, which will allow you to load a real copy of Linux, as it emulates a real computer. Personally, I use VMware Workstation (I’ve had it for years, but it’s a commercial product) which does the same thing, but I’ve heard nothing but good things about Virtual Box. You can then launch Linux in a window, and it’s a “real” linux version, which you will install from the distribution ISO.

Let’s say I want to display on the i3status bar whether a device/share is mounted.
How would that be accomplished?

I’m kind of new to i3, but as of what I’ve found online about the wm, it is a matter of finding the right parameter on i3status or i3blocks (whichever you use).

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Show NFS shares | List NFS mount points | List NFS clients Linux

Table of Contents

In this article I will share multiple commands and method to cover below topics:

• Show NFS Shares configured on the NFS Server
• List NFS mount points on the NFS Clients
• List NFS Clients which are connected to the NFS Server

Show NFS shares on NFS Server

Use showmount to show NFS shares

We can use showmount command to show NFS shares on the NFS Server using NFSv3 protocol.

You can also give server details to show NFS shares for the respective server

Use exportfs to show NFS shares

You can use exportfs to show NFS shares with all NFS versions. exportfs -v will show the currently shared directory lists with all the permissions per directory

Use master export file /var/lib/nfs/etab to show NFS shares

We use /etc/exports or /etc/exports.d to add any NFS share. Next when we refresh the list of shares using exportfs -r or exportfs -a , the shares list from /etc/exports and /etc/exports.d is updated in the master exports table /var/lib/nfs/etab .
WARNING: You should not edit /var/lib/nfs/etab file manually. You must always update shares under /etc/exports and /etc/exports.d

Check the content of /var/lib/nfs/etab to show NFS shares list and all the applied permission details

List NFS mount points on NFS Clients

There are various commands and methods to list NFS mount points

Use mount to list NFS mount points

We can use mount command to list NFS mount points on nfs-client .

Use nfsstat to list NFS mount points

Normally we use nfsstat to get the NFS mount point usage and statistics. But we can also use nfsstat to list currently used NFS mount points on nfs-client .

Use /proc/mounts to list NFS mount points

We can also check the content of /proc/mounts to list NFS mount points on nfs-client

List NFS clients connected to NFS Server

Use netstat to list NFS clients connected to NFS server

netstat is used to list the listening TCP and UDP ports. In the example I have one NFS client connected to the NFS server on 1018 port

Use ss to list NFS clients connected to NFS Server

ss id another utility to investigate sockets and is considered to be a replacement for netstat in future Linux releases. So we can also use ss command to list NFS clients connected to the NFS Server. Execute below command on the NFS server to list NFS clients.

In this example we have one NFS Client currently connected to the NFS server on port 1018.

Lastly I hope the steps from the article to show nfs shares on nfs server, list nfs mount points on nfs clients and list nfs clients connected to nfs server on Linux was helpful. So, let me know your suggestions and feedback using the comment section.

Related Searches: check nfs mount, list nfs shares, showmount command in linux, nfs client list remote exports, list nfs mount points

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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?

4 Answers 4

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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List only bind mounts

Rather than using mount | grep , I’d like to use mount -l -t bind , but that doesn’t work, and -t none shows all mounts.

5 Answers 5

Bind mounts are not a filesystem type, nor a parameter of a mounted filesystem; they’re parameters of a mount operation. As far as I know, the following sequences of commands lead to essentially identical system states as far as the kernel is concerned:

So the only way to remember what mounts were bind mounts is the log of mount commands left in /etc/mtab . A bind mount operation is indicated by the bind mount option (which causes the filesystem type to be ignored). But mount has no option to list only filesystems mounted with a particular set of sets of options. Therefore you need to do your own filtering.

Note that /etc/mtab is only useful here if it’s a text file maintained by mount . Some distributions set up /etc/mtab as a symbolic link to /proc/mounts instead; /proc/mounts is mostly equivalent to /etc/mtab but does have a few differences, one of which is not tracking bind mounts.

One piece of information that is retained by the kernel, but not shown in /proc/mounts , is when a mount point only shows a part of the directory tree on the mounted filesystem. In practice this mostly happens with bind mounts:

In /proc/mounts , the entries for /mnt/one and /mnt/partial have the same device, the same filesystem type and the same options. The information that /mnt/partial only shows the part of the filesystem that’s rooted at /sub is visible in the per-process mount point information in /proc/$pid/mountinfo (column 4). Entries there look like this:

Maybe this could do the trick:

The kernel doesn’t handle bind mounts different from normal mounts after the fact. The only differ in what happens while mount runs.

When you mount a filesystem (eg. with mount -t ext4 /dev/sda1 /mnt ) the kernel (a bit simplified) performs three steps:

1. The kernel looks for a filesystem driver for the specified filesystem type (if you omit -t or use -t auto mount guesses the type for you and provides the guessed type to the kernel)
2. The kernel instructs the filesystem driver to access the filesystem using the source path and any provided options. At this point the filesystem is only identified by a major:minor number pair.
3. The filesystem is bound to a path (the mountpoint). The kernel also uses some of the mount options here. ( nodev for example is an option on the mountpoint, not on the filesystem. You can have a bind mount with nodev and one without)

If you perform a bind mount (eg. with mount —bind /a /b ) the following happens:

1. The kernel resolves which filesystem contains the source path and the relative path from the mountpoint to the directory.
2. The filesystem is bound to the new mountpoint using the options and the relative path.

(I’ll skip mount —move , because it’s not relevant to the question.)

This quite is similar to how files are created on Linux:

1. The kernel resolves which filesystem is responsible for the directory in which the file should be created.
2. A new file in the filesystem is created. At this point the file only has an inode number.
3. The new file is linked to a filename in the directory.

If you make a hard link the following happens:

1. The kernel resolves the inode number of the source file.
2. The file is linked to the destination filename.

As you can see, the created file and the hard link are indistinguishable:

But, as you can identify all hardlinks to a file by comparing the inode numbers, you can identify all mounts to a filesystem by comparing the major:minor numbers of mounts.

You can do this with findmnt -o TARGET,MAJ:MIN or by directly looking at /proc/self/mountinfo (see the Linux kernel documentation for more information).

The following Python script lists all bind mounts. It assumes that the oldest mount point with the shortest relative path to the root of the mounted file system is the original mount.

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