List all devices connected linux

linux list devices

In Linux various special files can be found under the directory /dev . These files are called device files and behave unlike ordinary files. The most common types of device files are for block devices and character devices.

How much RAM do I have Linux?

To see the total amount of physical RAM installed, you can run sudo lshw -c memory which will show you each individual bank of RAM you have installed, as well as the total size for the System Memory. This will likely presented as GiB value, which you can again multiply by 1024 to get the MiB value.

How do I see devices on Linux?

1. The mount Command. .
2. The lsblk Command. .
3. The df Command. .
4. The fdisk Command. .
5. The /proc Files. .
6. The lspci Command. .
7. The lsusb Command. .
8. The lsdev Command.

How do I create a device on Linux?

1. Build the driver by using Makefile ( sudo make )
2. Load the driver using sudo insmod.
3. Check the device file using ls -l /dev/ . By this time device file is not created for your driver.
4. Create a device file using mknod and then check using ls -l /dev/ .

What are the two types of device files?

Does Linux have a device manager?

There are endless Linux command-line utilities that show the details of your computer’s hardware. . It’s like Windows Device Manager for Linux.

How do I check my RAM size?

Right-click your taskbar and select “Task Manager” or press Ctrl+Shift+Esc to open it. Click the “Performance” tab and select “Memory” in the left pane. If you don’t see any tabs, click “More Details” first. The total amount of RAM you have installed is displayed here.

How much RAM does Windows 10 take up?

In regards to Windows 10 RAM requirements, nowadays most basic Windows 10 systems comes with 4GB of RAM. Especially if you intend to run a 64-bit Windows 10 operating system, 4GB RAM is the minimum requirement. With a 4GB RAM, the Windows 10 PC performance will be boosted.

How much RAM do you need for Ubuntu?

Can Ubuntu run on 1gb RAM? The official minimum system memory to run the standard installation is 512MB RAM (Debian installer) or 1GB RA< (Live Server installer). Note that you can only use the Live Server installer on AMD64 systems. Once again, these are the bare minimum specifications.

Why do people use Linux?

1. High security. Installing and using Linux on your system is the easiest way to avoid viruses and malware. The security aspect was kept in mind when developing Linux and it is much less vulnerable to viruses compared to Windows.

Does Apple use Linux?

Both macOS—the operating system used on Apple desktop and notebook computers—and Linux are based on the Unix operating system, which was developed at Bell Labs in 1969 by Dennis Ritchie and Ken Thompson.

Appimage

How do I use AppImage in Linux?How do I run AppImage in terminal?What is a Linux AppImage file?How do I extract AppImage?How do I run Balena etcher in.

Port

How do I see open ports in Linux?How do I check if port 3306 is open Linux?How do I check if port 22 is open on Linux?How do I check if port 443 is op.

Local

How To add a Local User Account to Windows Server 2019Step 1: Open Server Manager. Click on your Windows Start button and search for “Server Manager” .

Latest news, practical advice, detailed reviews and guides. We have everything about the Linux operating system

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List USB Devices Linux

In the world of USB computer peripherals, almost everyone uses some sort of USB devices in their computer. These days there are USB webcams, USB hard drives, USB stick also known as PenDrive etc. Almost every device has a USB version of it. So if you’re using Linux, listing what USB device is connected to your system might be necessary at some point.

There are many programs and many ways to list USB devices on Linux.

In this article, I will show you how to list USB devices on Linux. I am using Ubuntu 18.04 Bionic Beaver for the demonstration, but these commands are available on every Linux distribution. So let’s get started.

Listing USB Devices using lsusb Command

The widely used lsusb command can be used to list all the connected USB devices in Linux.

As you can see from the output of the lsusb command in the screenshot below, all the connected USB device is listed. The Bus ID, Device ID, USB ID, and a title is displayed in the output of lsusb command.

As you can see in the marked section of the screenshot below, Realtek Semiconductor Corp. with ID 0bda:57cb, this is my USB Webcam.

You can’t tell that it’s a Webcam by looking at the output of lsusb command, Can you? Nope! So how do I know this? It’s because I checked the output of the lsusb command before and after connecting the USB Webcam and once I compared the outputs, the newly added row is the USB device I connected. Plain! But there are ways to find out what the USB device is.

You can use the dmesg command to find out more information about the connected USB devices. The last connected USB device is the easiest to find with dmesg command. It is more widely used for debugging purpose. You will shortly see why.

You run dmesg command as follows:

As you can see in the yellow marked box in the screenshot below, these are information about the USB device I connected last, which was my USB Webcam. You can see in one of the blue marked box, the USB device I connected is a HD UVC WebCam and its ID is 0bda:57cb.

By now you may have found out that the output of dmesg command is system log messages. Well yes, it is.

You can also search for a specific USB device by its ID in the dmesg system log.

Run the following command to open the output of dmesg command with less text pager:

You should see the following window:

Now to search for a string, press / key on your keyboard. And you should the a / appear on the bottom of terminal window as marked in the screenshot below.

Now type in the USB device ID. For example, earlier when I listed the connected USB devices with lsusb command, one of the USB device had ID 0bda:57cb

Type in the USB Device ID and press . As you can see in the marked section of the screenshot below, the search string is marked white.

You may press and arrow keys to navigate up and down and read through it. You should find a lot of information about that USB device as you can see in the marked section of the screenshot below.

Listing USB devices with usb-devices Command

You can run the following command to list all the connected USB devices of your system:

As you can see in the screenshot below, all the connected USB devices are listed. we can find out pretty much the same information as before with usb-devices command.

Listing Block USB Devices

If you want to list all the USB block storage devices, that is all the USB storage devices, then you can use the lsblk or fdisk command to do so.

Listing USB block storage devices with lsblk:

As you can see in the screenshot below, all the available block storage devices (including the USB block storage devices) are listed.

You can get almost the same information as lsblk command with blkid command. But you have to run it as root as follows:

You can also use fdisk command to list all the USB block storage devices as follows:

As you can see in the screenshot below, the connected block storage devices (including the USB devices) are listed.

That’s how you list all the USB devices on Linux. Thanks for reading this article.

About the author

Shahriar Shovon

Freelancer & Linux System Administrator. Also loves Web API development with Node.js and JavaScript. I was born in Bangladesh. I am currently studying Electronics and Communication Engineering at Khulna University of Engineering & Technology (KUET), one of the demanding public engineering universities of Bangladesh.

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How to List USB Devices Connected to Your Linux System

Mostly, people are interested in knowing what USB devices are connected to the system. This may help troubleshoot the USB devices.

The most reliable way is to use this command:

It shows the webcam, Bluetooth, and Ethernet ports along with the USB ports and mounted USB drives.

But understanding the output of lsusb is not easy and you may not need to complicate things when you just want to see and access the mounted USB drives.

I will show you various tools and commands you can use to list USB devices connected to your system.

I have connected a 2GB pen-drive, 1TB external HDD, Android smartphone via MTP and USB mouse in the examples unless stated otherwise.

Let me start with the simplest of the options for desktop users.

Check connected USB devices graphically

Your distribution file manager can be used to view USB storage devices connected to your computer. As you can see in the screenshot of Nautilus (GNOME File Manager) below.

The connected devices are shown in the sidebar (Only USB Storage devices are shown here).

You can also use GUI applications like GNOME Disks or Gparted to view, format, and partition the USB Storage devices connected to your computer. GNOME Disks is preinstalled in most distributions using GNOME Desktop Environment by default.

This app also works as a very good partition manager too.

Enough of the Graphical tools. Let us discuss the commands you can use for listing the USB devices.

Using the mount command to list the mounted USB devices

The mount command is used for mounting partitions in Linux. You can also list USB storage devices using the same command.

Generally, USB storage is mounted in the media directory. Thus, filtering the output of mount command on media will give you the desired result.

Using df command

df command is a standard UNIX command used to know the amount of available disk space. You can also use this command to list USB storage devices connected using the command below.

Using lsblk command

The lsblk command is used to list block devices in the terminal. So, here also by filtering the output containing media keyword, you can get the desired result as shown in the screenshot below.

If you are more curious, you can use the blkid command to know the UUID, Label, Block size etc.

This command gives more output as your internal drives are also listed. So, you have to take references from the above command to identify the device you wish to know about.

Using fdisk

fdisk, the good old command line partition manager, can also list the USB storage devices connected to your computer. The output of this command is also very long. So, usually, the connected devices get listed at the bottom as shown below.

Inspecting /proc/mounts

By inspecting the /proc/mounts file, you can list the USB Storage devices. As you can notice, it shows you the mount options being used by filesystem along with the mount point.

cat /proc/mounts | grep media

Display all the USB devices with lsusb command

And we revisit the famed lsusb command.

Linux kernel developer Greg Kroah-Hartman developed this handy usbutils utility. This provides us with two commands i.e. lsusb and usb-devices to list USB devices in Linux.

The lsusb command lists all the information about the USB bus in the system.

As you can see this command also shows the Mouse and Smartphone I have connected, unlike other commands (which are capable of listing only USB storage devices).

The second command usb-devices gives more details as compared but fails to list all devices, as shown below.

Greg has also developed a small GTK application called Usbview. This application shows you the list of all the USB devices connected to your computer.

The application is available in the official repositories of most Linux distributions. You can install usbview package using your distribution’s package manager easily.

Once installed, you can launch it from the application menu. You can select any of the listed devices to get details, as shown in the screenshot below.

Conclusion

Most of the methods listed are limited to USB storage devices. There are only two methods which can list other peripherals also; usbview and usbutils. I guess we have one more reason to be grateful to the Linux Kernel developer Greg for developing these handy tools.

I am aware that there are many more ways to list USB devices connected to your system. Your suggestions are welcome.

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