The kernel's device manager, responsible for the contents of /dev.

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67
votes
5answers
13k views

I can read from /dev/null; how to fix it?

I read the Wikipedia article on /dev/null and was playing around by moving files to /dev/null. For this I created a test_file and put some contents in it: $ touch test_file $ echo "This is written ...
34
votes
10answers
69k views

What is the correct way to restart udev?

I've changed the name of my eth1 interface to eth0. How to ask udev now to re-read the config? service udev restart and udevadm control --reload-rules don't help. So is there any valid way ...
17
votes
1answer
13k views

How do I change the keymap of a single device (Logitech presenter)?

My Logitech R400 presenter sends the following key codes: keycode 112 (keysym 0xff55, Prior) [page up] keycode 117 (keysym 0xff56, Next) [page down] keycode 60 (keysym 0x2e, period) keycode 71 ...
16
votes
6answers
48k views

How to make keyboard backlight Fn buttons work in Samsung Series 9?

I've just installed Ubuntu 12.10 on my Samsung 900X4C. However, I can't get the keyboard backlights to work. I added the keymaps as per community docs - Samsung Series 9 (section Function Keys). But ...
16
votes
3answers
2k views

How are key codes mapped to the appropriate action?

After figuring out how to change the mapping of scan codes to key codes using udev, see this question, I was wondering how those key codes (or events if you will) are mapped to the appropriate action. ...
15
votes
7answers
16k views

What is the best way to configure a Thinkpad's TrackPoint?

The previously useful ThinkWiki pages appear quite outdated. I am trying to permanently change my TrackPoint sensitivity and speed settings and enable middle mouse button scrolling. I have tried ...
14
votes
1answer
712 views

Only use Mass Storage devices on a selected USB port - how?

On a given USB port, I only want to accept USB Mass Storage capabilities, and nothing else. No HID devices, no Bluetooth adapters, no RS232 converters, nothing. Is there a way to do this e.g. using ...
13
votes
3answers
2k views

What happens under the hood when an USB drive is inserted?

Some systems use udev / pmount to automatically mount thumbdrives. How is that solved in Ubuntu (specifically, Ubuntu 12.04)? Apparently, neither the pmount package nor the corresponding udev rules ...
12
votes
1answer
769 views

USB sticks not accessible & system hangs at shut-down: related to older hardware?

Please notice the three updates at the end of the post. Original problem I installed Lubuntu 14.04.1 on an older Acer Travelmate 4500 using the forcepae option and adjusting upowerd.py according to ...
11
votes
2answers
3k views

Make the zoom slider of Microsoft Natural Ergonomic Keyboard 4000 and 7000 scroll up and down, in 14.04 (Trusty)

I tried to use this tutorial to make scroll switch work on my Microsoft Natural Ergonomic Keyboard 4000. But I face following error: sudo: /lib/udev/keymap: command not found I have udev version ...
11
votes
2answers
4k views

Prevent a specific USB device from auto-mounting

I want to stop a USB device from automounting in Ubuntu 13.04. For example, when I connect my iPhone 5 to my desktop I am consistently prompted for what I want to do (whether or not I want to erase ...
10
votes
4answers
16k views

Configure udev to change permissions on USB HID device?

I have a USB scale, a USB HID. Currently, when it is plugged in, the permissions only allow the superuser to access it. How can I configure udev to let anybody access this device? I have the vendor ...
10
votes
2answers
224 views

Alert the user when they unsafely unplug an USB thumb drive

Users repeatedly complain about lost data on USB thumb drives after they unplugged them without unmounting. We run Ubuntu 14.04 LTS on our machines. Auto-mounting is enabled. As I am tired of ...
10
votes
2answers
8k views

How can I properly create /dev/dvd?

Certain programs look for /dev/dvd by default to find DVDs. When I first boot my computer without a DVD inserted, /dev/dvd exists and points to the correct place (/dev/sr0). However, when I insert a ...
10
votes
4answers
14k views

Auto-switch audio to HDMI when HDMI monitor/receiver plugged into laptop

I have a laptop with an HDMI port. While we're homeless and staying with friends I've been plugging it into their surround sound receiver with an HDMI cable. To get sound working I have to open up the ...
8
votes
4answers
28k views

How to distinguish between identical USB-to-serial adapters?

I use a number of identical USB-to-serial adapters with my laptop (Ubuntu 9.10). The adapters are manufactured by Sabrent and are built around a Prolific PL2303 IC, as shown by lsusb: Bus 001 Device ...
8
votes
2answers
372 views

How to execute C++ program whenever a USB flash drive is inserted

I have a C++ program that accesses USB pen drives/flash drives. It works for currently inserted flash drive. A normal C++ program doesn't execute until we run it. But I wanted the program to run ...
8
votes
1answer
19k views

How do I set executable permissions on a removable drive?

I'm using Ubuntu 10.10 and using a usb drive but I'm finding that I can't chmod any programs on the drive to +x. It is being auto-mounted by Gnome (using udev, I think?) so I imagine the problem is a ...
7
votes
6answers
8k views

How can I tell linux kernel to completely ignore a disk as if it was not even connected?

Notice Please scroll down for the answer (it has 0 points but it is the correct one). The problem is solved by a patch that will be in kernel 3.12.7 and up; I hope it will back-ported to earlier ...
7
votes
3answers
11k views

How can I create a new socket in /dev?

I want to create a new socket file in /dev. Does the way to get it is adding a new rule to udev?
7
votes
1answer
2k views

How do I make noatime mounts default?

I'm making an Ubuntu derivative, and I want to make noatime the default mount option for all filesystems (instead of relatime which is default in Ubuntu). There seems to be a boolean default_relatime ...
6
votes
2answers
145 views

Change ethX index

When I run ifconfig in one of my machine I saw these. The Q is where does the index eth3 and eth4 from? Is there a way to change them to eth0 and eth1? $ ifconfig eth3 Link encap:Ethernet ...
6
votes
3answers
19k views

How to get Bus and Device relationship for a /dev/ttyUSB

I need to write an script for restart USB dongles. I have all tools but I can't link my /dev/ttyUSBx to physical BUS and DEVICE. An issue is that I have three dongles with the same id vendor and id ...
6
votes
1answer
3k views

Udev webcam rule read, but not respected?

I have two usb-webcams on them machine, but at boot they sometimes switch /dev/video number. The solution to this problem seems to be creating a new udev rule. I have added this rule ...
6
votes
1answer
6k views

How does automated hotplug mounting work?

I was reading a bit about gnome-mount, HAL, udev, etc. It left me with a couple of faint ideas how mounting a hotplug device might work in the latest Ubuntu release. Could someone give a detailed ...
6
votes
3answers
2k views

Rebuild accidentally deleted /dev

How to rebuild /dev/ on an Ubuntu lucid where everything in /dev/ were accidentally deleted? MAKEDEV std and MAKEDEV pty aren't enough, which isn't surprising on a system using udev. I haven't ...
6
votes
1answer
453 views

Executing a script when inserting a flash drive

How can I write a script that fires on an event? When I insert an USB flash drive, Ubuntu mounts it and automatically opens Nautilus. When this happens with a specific flash drive, I'd like to open a ...
6
votes
1answer
2k views

My custom udev hwdb rule doesn't work

I'm using ubuntu 14.04 installed in EFI Mode, I tried to write simple udev rule which for all external USB keyboards will map capslock for escape. I use a lot of vim and plug and unplug keyboards ...
6
votes
1answer
406 views

How to run a script when password is entered at the lock screen?

To toggle the enabling/disabling of my notebook's touchpad according to connected USB mouse, I used touchpad-indicator, which runs a daemon to monitor connected devices and take appropriate action. ...
6
votes
1answer
2k views

How do I let other users access my /media/[username]/HARDDRIVE with Ubuntu 12.10?

I am trying to let other users access my external 1TB NTFS hard drive mounted automatically at /media/[username]/STORAGE The problem is that by default, udisk2 (present with Ubuntu 12.10) ...
6
votes
2answers
152 views

How can I temporarily suspend Nautilus filesystem automounting, without making permanent changes to the system and user configuration?

I have written a tool which automatically formats and copies files to USB flash drives when they are inserted. It needs the drive to be unmounted to format it. Normally Nautilus will automatically ...
5
votes
2answers
319 views

udev rules to allow only one vendor and model USB drive but no others

So, we're working to set up an environment here where we have a secure storage setup on our Linux laptops, such that our Linux laptops can only connect a specific USB drive: a Kingston DataTraveler ...
5
votes
1answer
5k views

Ubuntu won't save my settings for thinkpad trackpoint

I'm using Ubuntu 12.04 on a Thinkpad X200. To configure the trackpoint, I use "configure TrackPoint". Unfortunately I can't make Ubuntu saving my settings (concerning the sensitivity etc.). Whenever I ...
5
votes
2answers
1k views

Can I prevent an IDENTIFY PACKET DEVICE command to a specific device at boot?

This is related to a previous question related to installation that is now resolved. I'm opening a new question, because I still need to get my DVD drive working. Problem: Failed boot when my ASUS ...
5
votes
1answer
178 views

Run script when monitor is connected

I am trying to run a script located in usr/local/bin/ when I connect an external monitor to my laptop. I have tried to add a new udev rule but that did not work. I created a new file in ...
5
votes
1answer
345 views

Get keyboard scancodes in Ubuntu 13.10

I'm trying to find out the scancodes for a set of foot pedals so that I can rebind them to more useful keys. In older versions of Ubuntu I was able to do this using /lib/udev/keymap as discussed here, ...
5
votes
1answer
1k views

Why is this udev rule blocking?

Here is a rule from my /lib/udev/rules.d directory: SUBSYSTEM=="input", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="008c", RUN+="/home/mikeknoop/scripts/udev-receiver.sh" Here is the simple contents ...
5
votes
1answer
1k views

How do I hide / remove a partition from the Nautilus left panel?

I have a luks setup with encrypted partition. And I don't want everyone on my computer to see that I have such partition. Unfortunately it shows up in the nautilus "devices" panel as "Encrypted ...
4
votes
2answers
8k views

How do I make udev rules work?

I would like to learn udev rules. Here is what I do: victor@X301A1:~$ ls /etc/udev/rules.d/ 70-persistent-cd.rules 70-persistent-net.rules README Then: victor@X301A1:~$ sudo gedit ...
4
votes
3answers
5k views

udev Run commands not running

I'm trying to create a udev rule to unlock my computer when I connect my phone by USB. I could not find that that rule was being ran and so I tried a much simpler rule. This is the rule (anonymized) ...
4
votes
1answer
5k views

How do I configure libfitbit?

To use Ubuntu to upload FitBit data you need libfitbit which is available as ppa now. However I couldn't find configuration instructions. I also wonder if cuttlefish could help to get the same ...
4
votes
1answer
4k views

Assign fixed path to printer (/dev/usb/lp0)

I have two USB printers. They are assigned a path depending on the order of turning them on. The first one is /deb/usb/lp0 and the second one /deb/usb/lp1. However, I sometimes echo to these printers ...
4
votes
3answers
3k views

Start script when connecting phone through usb

Trying to run a script when my phone is plugged in via USB, a made a udev rule looks like this in /etc/udev/rules.d/85-lazydroid.rule ATTRS{idVendor}=="22b8", ATTRS{idProduct}=="428c", ...
4
votes
1answer
130 views

How to allow software access to any USB devices?

I have a libusb-based program that can't open USB devices on a freshly installed Ubuntu because it lacks permissions. This solution will probably work for me, but it requires manually specifying ...
4
votes
1answer
3k views

Problem with executing udev rules for olimex's avr-usb-jtag

I'm using Ubuntu 12.04 for programming purposes and recently decided to bring my previous atmel's micro-controller projects from Win to Linux. Namely AVR. I installed the tool chain all right. It ...
4
votes
1answer
3k views

USB device changes using udev and D-Bus

I am trying to get a list of currently plugged in USB devices in Ubuntu 10.10 and monitor changes that happen, like devices being plugged in or out using udev and D-Bus. I'm fairly new to ...
4
votes
0answers
175 views

How can I link some device (given by its device ID) with an specific firmware? [closed]

Imagine I have a new device which it's not working on Linux. I get its device ID with lsusb: Bus 001 Device 003: ID1164:7efdYUAN High-Tech Development Co., Ltd Imagine I know that this device will ...
4
votes
1answer
2k views

How do you change udev rules without restarting (e.g. to change eth1 to eth0)?

TLDR; How do you apply changes to /etc/udev/rules.d/70-persistent-net.rules without restarting? (See this documentation about ethernet interface logical names.) Long version: I have a bootable USB ...
4
votes
0answers
946 views

Run script AFTER automounting usb hdd (udev, mount --bind) [duplicate]

Possible Duplicate: How to run a script when a distinct flash-drive is mounted? When plugging-in my USB HDD, it is mounted automatically, as expected. After that event, I'd like to ...
3
votes
3answers
15k views

How to disable udev net rule generation?

In our cloud, we generate MACs with the prefix 2c:c2:60 for instances. When we re-use an instance, or duplicate it, the new copy gets another MAC address. When the new copy boots, the NIC gets the ...