Skip to main content
Unix & Linux

Questions tagged [devices]

Ask Question

devices refers to questions about the Unix/Linux device special files, normally these are under /dev. Do not use this tag for physical devices (for that use e.g. usb or pci).

859 questions
Newest Active Bountied Unanswered
Filter by
Sorted by
Tagged with
1 vote
1 answer
87 views

I use gphoto2 2.5.28-2build2 and v4l2loopback 0.12.7-2ubuntu5 in order to use my Sony A6500 DSLR as a USB webcam in Linux Mint. Just to make this clear from the start, the camera is working but the ...
godfatherjohn's user avatar
  • 121
7 votes
2 answers
795 views

I have two NVMe drives in my Proxmox computers. My problem is that the drive names are not persistent and change in connection with reinstallation or reboot. The problem is not specific to NVMe drives....
Søren Sjøstrøm's user avatar
  • 117
4 votes
2 answers
885 views

On my Linux Ubuntu I've a Linux bridge vnet0_6. You can check the mac address of each of the two interfaces attached to bridge's ports. root@eve-ng62:~# brctl show vnet0_6 bridge name bridge id ...
CarloC's user avatar
  • 385
0 votes
1 answer
227 views

I'm working on a project that aims to use a small (6-key keyboard) to control music played by mpd (and mpc) on a Raspberry Pi. Obviously I need to "capture" the keyboard inputs, and ...
Seamus's user avatar
  • 3,896
-1 votes
1 answer
135 views

everyone. I have a completely filled root filesystem, but I can't figure out what it is. sudo df -h / /dev/nvme0n1p2 49G 49G 0 100% / sudo du -h --max-depth=1 --exclude="media" --...
Raalgepis's user avatar
  • 21
1 vote
0 answers
591 views

I have a RHEL9 system with a NVIDIA L40S and Driver Version: 570.124.06 CUDA Version: 12.8. Installed as described here by (basically) running: # dnf config-manager --add-repo http://developer....
azzid's user avatar
  • 1,020
1 vote
0 answers
38 views

I wrote a Python script to manage keyboard events using python-libevdev, although I don't believe the script itself is related to my problem. I configured udev and systemd to automatically start/stop ...
jth's user avatar
  • 225
0 votes
0 answers
141 views

I have a Lenovo Duet 3 with PostmarketOS 24.12 aarch64, GNOME 47 and openRC. The tablet has a power button which suspends the tablet to RAM when pressed, but when the tablet is suspended it is also ...
cidra's user avatar
  • 131
12 votes
3 answers
2k views

This works head -c 10 /dev/zero | sed 's/\x0/x/g' and generates xxxxxxxxxx as expected. Then I tried this: sed 's/\x0/x/g' /dev/zero | head -c 10 which seems to just hang. Then I thought, oh, sure, ...
Enlico's user avatar
  • 2,362
1 vote
0 answers
96 views

I'm accessing a remote iscsi based SAN using multipath. The network on the server side has known intermittent issues such that there are session failures and path failures/IO failures. I'm not trying ...
Neetz's user avatar
  • 111
0 votes
0 answers
41 views

I'm getting timeouts on inquiry while a write buffer is active because the device cannot respond to the inquiry until the write buffer is complete. See errors . Dec 10 16:04:39 soul kernel: sd 0:0:34:...
Tim O'Callaghan's user avatar
  • 1
1 vote
0 answers
296 views

I'm using Linux in an embedded environment. I want to use a particular GPIO pin as a PPS source to be used with gpsd. I think the pin is configured correctly because I can see high/low transitions ...
R Mason's user avatar
  • 11
0 votes
0 answers
133 views

I want to be able to intercept a FF (force feedback) event (vibration/rumble in this case) that would normally go directly to the gamepad device file, to send an event to some other device while ...
Sasha's user avatar
  • 1
0 votes
2 answers
157 views

I want to add a Linux system to the white list of a WiFi mobile hotspot running on Android. Doing hostnamectl returns, amongst other information, a Static hostname, an Icon name, a Machine ID, and a ...
user avatar
2 votes
1 answer
260 views

When I run ls -l /dev on my Ubuntu, I get output like this: $ ls -l /dev total 0 crw-r--r-- 1 root root 10, 235 Aug 24 16:36 autofs drwxr-xr-x 2 root root 340 Aug 24 16:40 block crw------- ...
dayuloli's user avatar
  • 537
1 vote
0 answers
119 views

I am learning RPMSG in Linux, and I found there is a samples/rpmsg_client_sample.c. I built it into a kernel module, but I don't know how to make its probe function to be called? And is there any ...
wangt13's user avatar
  • 651
0 votes
1 answer
169 views

With previous platform the boot device was mtdX, and there could be only one sd-card, always appearing in the system as mmcblk0. New system has internal eMMC, which is mmcblkX, as well as may have sd-...
Anonymous's user avatar
  • 111
7 votes
1 answer
1k views

I know that something like eth0, eth1, ... has been replaced for long time by more predictable names. However, I don't understand what rule is applied if comes to Ethernet devices. I have multiple ...
Tintenfisch's user avatar
  • 225
1 vote
0 answers
328 views

I have a temp/humidity sensor connected to the i2c-0 interface on a Raspberry Pi: Rpi OS ver 'bookworm'. It works fine, and I can read sensor values from the files in /sys/class/hwmon/hwmon2 (or ...
Seamus's user avatar
  • 3,896
0 votes
1 answer
719 views

I have a RHEL 8 VM image that I have converted from Virtual Box to Hyper-V but it fails to start (works in VB but not in Hyper-V). Timed out waiting for device dev-di...97\x2d9636\x2dc104a96af2a5....
johna's user avatar
  • 1
0 votes
0 answers
507 views

I'd like to use my OBS virtual camera in a virtual machine. OBS will not run within a virtual machine unless I perform a GPU-passthrough, which I feel is unnecessary and undesirable in this situation. ...
adamlaughlin's user avatar
  • 11
1 vote
0 answers
289 views

I am facing multiple issues with my Logitech Zone Vibe 125 headphones, which are connected via Bluetooth to my Debian Linux system. Each time I launch Zoom, I encounter no audio output. While I can ...
borchisan's user avatar
  • 11
0 votes
3 answers
324 views

I am installing a Fedora CoreOS v39.2024030 on a bare metal system (PowerEdge server) through a iDRac interface. It's a two-step process: Here it's needed to boot the system into a LiveISO (virtual ...
Rajendra's user avatar
  • 101
1 vote
2 answers
151 views

There have been multiple questions asked about this, like Understanding ls output, What are columns in ls -la?, What does 'ls -la' do?, What do the fields in ls -al output mean?, etc.. I've also come ...
TrisT's user avatar
  • 121
0 votes
1 answer
721 views

On our A100 machine, we frequently have zombie processes that still allocate memory when already stopped. I usually used fuser -v /dev/nvidia* to determine the PIDs of all processes and kill them ...
Green 绿色's user avatar
  • 331
2 votes
2 answers
795 views

What is the difference & relation between audio sink and audio card/device? Can a sink sink into more than 1 device of the same audio card? aka, sink-device ca be a one-to-many relation? PS: I'm ...
Adrian's user avatar
  • 773
-2 votes
1 answer
106 views

Why does a device node need to be made in udev when you plug in a device into your computer? Why does a device node need to exist?
How To Linux's user avatar
  • 161
0 votes
0 answers
237 views

Error Message: dev/sda2: The filesystem size (according to the super) is 31126889 blocks The physical size of the device is 29884416 blocks Either the superblock or the partition table is likely to ...
SatoruGojo's user avatar
  • 1
1 vote
0 answers
54 views

I'm on a Dell Vostro 16 laptop (running elementary OS 7.1 based on Ubuntu 22.04.3, kernel 6.5). The laptop has a backlit keyboard that can be controlled using /sys/class/leds. Specifically, to turn ...
a pfp with melon's user avatar
  • 151
0 votes
2 answers
681 views

What happened to this node/symlink? It used to be there for ages, linking to the primary display adapter, and I cannot find it any longer with Linux 6.7.4. I've not found anything relevant in the ...
Artem S. Tashkinov's user avatar
  • 33k
0 votes
1 answer
208 views

I can't find any explanation about this file in the official documentation, I just know from the official documentation in devices.txt that this file is: "234 = /dev/btrfs-control Btrfs control ...
xnl2d's user avatar
  • 27
1 vote
1 answer
157 views

I searched /dev/autofs from https://www.kernel.org/doc/Documentation/admin-guide/devices.txt I searched for /dev/autofs in and found that it is 10,235. I used debian and stat /dev/autofs shows 10,235 ...
xnl2d's user avatar
  • 27
1 vote
1 answer
351 views

The problem is: my pseudo-terminal is /dev/pts/0, the target pseudo-terminal is /dev/pts/4, and I'm trying to get the target pseudo-terminal to print text using the echo text > /dev/pts/4 command. ...
xnl2d's user avatar
  • 27
1 vote
1 answer
462 views

I have bought a FIDO-U2F/FIDO2 usb security token and managed to add it as passkey for github on my macOS (sonoma). It didn't work for another site and I suspect that it's because the key doesn't have ...
chmike's user avatar
  • 231
1 vote
1 answer
339 views

I have never used a Mac before and have no idea what I'm doing. I need to run dd on a USB device to copy data off. I plug the device in, and it shows up in system_profiler SPUSBDataType. How do I ...
Nate's user avatar
  • 154
0 votes
1 answer
32 views

I recently set up a debian 12 VPS with a new hosting company. It has: /media/cdrom -> cdrom0/ /media/cdrom0/ And in /etc/fstab: /dev/sr0 /media/cdrom0 udf,iso9660 user,noauto 0 ...
lonix's user avatar
  • 2,015
0 votes
2 answers
826 views

I was flashing a Flipper Zero Wifi Dev Board and I needed to have /dev/ttyACM0 owned by dialout group... The thing is now I have tried to revert the stuff, making a chown root:tty /dev/tty*, and chmod ...
DaniWein's user avatar
  • 1
1 vote
0 answers
320 views

I have an embedded system with ubuntu running on it. Inside its /etc/udev/rules.d directory i put a file named 99-mydevice.rules: KERNEL=="video0", SUBSYSTEM=="video4linux", ...
Marco Montevechi Filho's user avatar
  • 187
0 votes
0 answers
55 views

Why are the /dev/sdX names not persistent and we have to use udev rules or something else? Why the name changes? Is it only the name and permissions or does something else change as well? Why?
Astora's user avatar
  • 519
0 votes
1 answer
274 views

I have a GPS unit which attaches by a USB port to Raspberry Pi. Because of the "mysterious" (to me) way the Arch Linux system that powers the Pi assigns /dev/ filenames, I never know if I'm ...
Steve Cohen's user avatar
  • 539
0 votes
1 answer
807 views

I am working on an embedded Linux system (5.10.24), where there is a NAND FLASH as storage. The NAND FLASH supports internal ECC and has 128Bytes OOB. Its DS says if the ECC is enabled the last ...
wangt13's user avatar
  • 651
2 votes
1 answer
618 views

I've been doing several chrooted environments in parallel, each in separate folder (when the script with chroot exited I sometimes run another in same folder), and for a while it seemed fine. But now ...
Alex Martian's user avatar
  • 1,319
0 votes
2 answers
189 views

I am looking to install a new linux distro in my computer and I'd like for it to not have access to other disks in my pc (e.g the disk where I have all my documents, other operating systems, etc.) ...
Juanjo's user avatar
  • 1
0 votes
3 answers
1k views

I have an external microSD card plugged into my machine via a USB stick. I believe it was auto-mounted because I can see $ ls /media/me 7538-3DFD I believe it is mounted to /dev/sda1 because I see $ ...
user1245262's user avatar
  • 145
0 votes
0 answers
103 views

I'm working on a kernel-level device driver that sends requests to an underlying piece of hardware. Those requests have a fixed length and a given layout (including multiple fields with encoded values,...
ismarlowe's user avatar
  • 1
3 votes
1 answer
3k views

I understand that you can write custom udev rules to create a symlink in /dev directory. But what is the use of having a symlink in /dev? What is the symlink linking to? I know you can interact with ...
Dr. Chocolate's user avatar
  • 231
0 votes
0 answers
384 views

Hopefully this is not a duplicate question, I have found some similar ones but none that exactly match. I have an Arch Linux installation dual booted alongside a Windows installation, both on ...
Jacob Garby's user avatar
  • 158
1 vote
1 answer
366 views

Is it possible to set priorities for audio output devices, such that audio will be sent to the appropriate output, depending on what’s plugged in? (That is, hot pluggable: the priority list should be ...
Xophmeister's user avatar
  • 141
0 votes
1 answer
199 views

I have a drive that is about 1TB big. It is mostly free space. When you add up the size of all the partitions, it is less than 256GB. I have another drive that is 256GB. I would like to clone the data ...
user168226's user avatar
  • 103
1 vote
0 answers
28 views

I moved the source of a loop drive into its mountpoint and umount it. Then the source disappeared. Note that after moving the source to its mountpoint (or other location), the source was shown as ...
PanJianhong's user avatar
  • 71

1
2 3 4 5
…
18