Udev is a Linux process that manages device file entries under /dev

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Pushing changes to driver repos

My understanding of dkms is that its a way to dynamically manage all connected/disconnected device drivers on a Linux system. If that's correct, then I have to imagine that it allows you to configure ...
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What's wrong with this udev rule?

I'm reading through this link in trying to make the appropriate rule to make the BSG device nodes have group ownership of wheel and permissions of 0660. This is the rule that I have: [user@mylinux ...
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Cloned Linux system and /etc/udev/rules.d/70-persistent-net.rules

I set up an Ubuntu system and configured it properly, including defining eth0 in /etc/network/interfaces. I then imaged that system and cloned it on a new system. When I booted up the system the ...
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Network card seems to be active but config file is missing?

I have a CentOS 7 virtual machine with an internal network as well as 2 bridged connections, I am unable to find the config file for the third network card. Any ideas where it could be? or what the ...
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many systemd-udevd spawns on embedded device

On my embedded device I observe a lot of systemd-udevd processes. Every few minutes a new systemd-udevd is spawning. At the same time a usb device (GSM Module) gets recognized and disconnect a few ...
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How to know when a device is ready

I have firewire mixing console and I wrote an udev rule which calls a script to set up the whole audio chain (alsa -> pulseaudio -> jackd -> firewire) as soon an the console is switched on. Now I ...
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No Default Gateway route for bond0 / Slave eth* interface gets IP assigned

I have set up a 4-NIC bond on my Debian Wheezy box. After a fresh boot, the system has LAN access, but cannot resolve outside host names or access outside IPs. It seems that this is because the bond0 ...
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Udev rule: ACTION=“add” is working, but ACTION=“remove” isn't working!

I've written file 90-usb.rules under /etc/udev/rules.d/ containing: ACTION=="add", ATTR{idVendor}=="0bb4", ATTR{idProduct}=="2008", RUN+="/bin/mkdir /home/pandya/Desktop/testdir" ACTION=="remove", ...
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Run a script that displays an X window from an udev rule

I found several questions on http://unix.stackexchange.com & on http://stackoverflow.com related to launch script by udev rules. But I can't find exact solution or certain answer for executing ...
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udev .rules not running script

I'd like my computer to run certain scripts when a specific keyboard is (1) plugged in, (2) plugged out, (3) detected at startup. Here's the device: [rob@X200 vim]$ lsusb | grep keyb Bus 005 Device ...
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Udev : renaming my network interface

I just installed RHEL 6.3 on a Dell 1950 server. This server as two GBit ports, Gb0 and Gb1. For some obscure reason, udev chose to name Gb0 eth1 and Gb1 eth0. This is definitly not a good find for ...
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lshw lists my drive but it has no /dev file

Ive just got a dedicated server which has 2x 1TB HDD. However when I type df -h I get the following: [root@sd-56537 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 916G ...
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Difference between /dev and /sys

Exactly what is the difference between devfs and sysfs? Both seem to maintain a list of hardwares attached to the system. Then why the need for 2 separate fs even arose? As far as I can get /sys ...
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What is the difference between HAL and udev?

As far as I understand, if I have 3 different network cards, then HAL will cal each of them eth0, eth1 and eth irrespective of their brands, manufacturerers etc. But it seems to me that udev precisely ...
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USB connect/disconnect notification

I use Linux Mint 13 MATE, and I'm trying to set up notifications when I plug/unplug devices. First of all, I found udev-notify package, but unfortunately it almost doesn't work for me: it works for ...
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Trouble getting USB printer to 'stick' using udevadm

What I’ve got so far $ udevadm info -a -p$(udevadm info --q path -n /dev/usb/lp1) | grep serial ATTRS{serial}=="544336460792090000" /etc/udev/rules.d/50-udev.rules: SUBSYSTEM=="usb", ...
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Ubuntu 13.04 does not recognize USB drive

Using Ubuntu 13.04 (with Gnome 3), my new USB stick (details see dmesg/lsusb) doesn't show up automatically. Situation: The drive does not show up at fdisk -l The drive does appear when running ...
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UDEV Rule Not Triggering

I have gone through 10s of answers on this and other sites trying to debug my udev rule, but to no avail. The rule is very simple: I want to lock my screen when my Yubikey is unplugged. My rule is ...
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how to write a udev rule to remove a tag?

Is it possible to write a new udev rule that undoes TAG+="uaccess" (removes the uaccess tag) without undoing any of the other tags on a device? If so, how? (I have a device that should be opened by ...
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serial port devices not found on bootup

I am running linux kernel 3.9.2 on my embedded device. I have this standalone program called usb_device_label.c, which checks for various USB devices connected and passes the information to main ...
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Error to install svn on ubuntu 14.04

I tried to install SVN on ubuntu 14.04 and got the following error: $ sudo apt-get install subversion apache2 libapache2-svn apache2-utils * udev requires hotplug support, not started ... fail! E: ...
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Are there alternatives to using `udev`?

While I understand the greatness of udev and appreciate the developers' effort, I was simply wondering if there is an alternative to it. For instance, I might imagine there should be a way to make ...
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udevadm trigger runs only one rule

I have 1294:1320 RISO KAGAKU device on F17. The problem is after sleep/resume hid reclaims this device back and its udev rule is ignored. If I unplug and plug in the device it is OK until next ...
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Udev RUN rule to run touch has no effect

I've created the file bellow $ cat /etc/udev/rules.d/10-tuned.rules SUBSYSTEM=="power_supply", ENV{POWER_SUPPLY_STATUS}=="Charging", RUN+="touch /home/fx/charg" SUBSYSTEM=="power_supply", ...
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udev rule not working with su [duplicate]

I want to run a simple script when I plug in a monitor, and here is my rule: KERNEL=="card0", SUBSYSTEM=="drm", ENV{DISPLAY}=":0", ENV{XAUTHORITY}="/home/user/.Xauthority", RUN+="/home/user/auto.sh" ...
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/dev/disk/by-id creating wrong symlinks for harddrive

I'm running into an interesting problem where on reboots and power cycles, my harddrives will occasionally be given the wrong symlink in /dev/disk/by-id. For example, when I issue ls /dev/disk/by-id I ...
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arch linux recognizes the partitions and hard disks wrongly

My arch Linux system does not recognize neither the partition nor the hard disk in which it is installed. it is installed on /dev/sdb1 but it recognizes that as /dev/sdc1 and the initialization goes ...
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Get ID and Mounted location of an USB

I need to find a way of retrieving the ID and Mounted Location for USB devices. I've found two commands that gives me what i want, but i haven't find how to associate them.. rsm@matrice:~$ lsusb Bus ...
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System doesn't see HDMI attached tv&receiver until reboot

When my system starts and receiver with tv are disabled during boot, then system will not see them even if later I will replug hdmi cable. To make receiver/tv visible to the system, I must leave them ...
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Arch, Ubuntu: So what's the deal with libudev.so.0?

I'm interested in building Linux desktop apps with Web front-end technologies. Both platforms I've tried -- Chromium Embedded Framework/CEFPython, and Awesomium, seem to have a dependency on ...
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How do I get ata-style IDs in /dev/disk/by-id to work for USB disks?

I have USB drive dock that I'm plugging SATA drives into. The way they show up in /dev/disk/by-id seems to be dependent on whether the drive has a partition table (usb if not, ata if yes). This makes ...
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stop an external hard disk from being in group floppy

I have an external hard-disk, connected by usb. Because it is external, the /dev file for it is in group floppy. However I use it as if it is internal. I also sometimes format sd cards and other usb ...
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How to modify rights automatically when I plug a usb device ?

I am running CentOS 6.6. I need to get specific rights (666) on /dev/bus/usb/... when I plug a specifc usb board (Digilent FPGA board). Otherwise my software complains about LIBSUB_ERROR_ACCESS. It ...
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create several /dev/xconsole files automatically upon boot

I understand from my previous question that the /dev/xconsole file can be created using mkfifo. On my system (Debian Wheezy), /dev/xconsole gets created automatically. I am wondering who creates it ...
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UDEV rule to run partprobe on loop device

I use udisks2 to mount raw image over a loop device: udisksctl -f image.img --no-user-interaction Policykit is configured, so no errors here. For some reason kernel does not want to re-read ...
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How to run custom scripts upon USB device plug-in?

What is the state-of-the-art method for automatically executing custom scripts upon USB device plug-in under current Linux distributions like Debian/CentOS/Fedora? For example if you want to ...
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How to disable USB devices based on their vendor ID on GNU/Linux?

In that question someone wanted a blacklist for all USB devices, and then only allow specific devices. In this question, we want to accept all USB devices, but prevent the driver (e.g. cdc_acm) from ...
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Udev running hibernation script

I have this udev rule that launches a script when the battery level is 5% or below: $ cat /etc/udev/rules.d/90-lowbat.rules: SUBSYSTEM=="power_supply", ATTR{status}=="Discharging", ...
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How to disable USB Keyboard at run time from udev.c not from udev rules

I want to disable my USB keyboard at boot time (in some scenarios) without modifying udev rules, as I know udev rules only works when a device is attached or detached from the target. Is there any ...
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How to populate /etc/network/interfaces automatically

I am trying to populate /etc/network/interfaces with a dhcp config for all interfaces at the first system boot (Debian 7.6 server). I modified the script in : /lib/udev/write_net_rules by adding: ...
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Auto-hibernate with udev rule

I'm using Debian Jessie with systemd. In the past I've used an acpid script that let's my computer hibernate when the battery is 5% or below. In an attempt to make a replacement for that I've made ...
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Unable to unmount a partition - respawned by udev

I have set up the udev rules to automatically mount/unmount the removable devices with udev rules based on this answer (have not enough reputation to comment there). The setup works fine, but when I ...
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How do I get a udev rule that used to work in older versions to work in Linux Mint 17 [duplicate]

I've been using this udev rule for probably ten years: ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", NAME="FTDI/$attr{serial}", MODE="666" I'm sure it's typed correctly as every time I install ...
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Is there a udev attribute/something that determines whether a device is a USB drive or not?

I am trying to create a UDEV rule to match/allow the use of USB devices. However, there is a twist. I want to be able to use only USB mass storage. Is there a unique UDEV parameter that can be used ...
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Failing to load a module on udev event

I have a pretty simple udev rule which is executed when a USB is plugged into my Debian machine: SUBSYSTEMS=="usb", KERNEL=="sd?", ACTION=="add", RUN+="/usr/local/bin/USB/t.sh \ %k" My t.sh is also ...
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Udev rule not working on Debian

I can detect and mount my USB drive on my Debian VM machine. And the first post here - explained below - works on my Ubuntu machine. Should not it work on Debian too? It doesn't of course. Why is ...
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Ubuntu 14.04 HDMI UDev Script

I have tried multiple variations to this script but I cannot get it to work. The UDEV Rule fires the script and the script exectutes but simply does not change the audio profile. If I run the script ...
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udev rule trouble on a Raspberry Pi (Raspbrian) using an ACR122U card reader

I am trying to get my ACR122U usable by all users on my Pi. I have the drivers installed correctly and nfc-list is working for root: root@raspberrypi:/etc/udev/rules.d# nfc-list nfc-list uses libnfc ...
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character device file (rtai_shm) disappears under runlevel=5 in fedora9 (exists when runlevel=3)

I am trying to run Realtime (RTAI) on my Linux Fedora 9 machine. For that, it is needed to have a character device file, named rtai_shm, in /dev, that takes care of shared memory. I have made this ...
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Why doesn't xsetwacom work from udev?

I made a script to rotate my Wacom Bamboo tablet 180 degrees. It works fine when I execute it as myself (user) or root, but when started from udev (i.e. when plugging the tablet into a usb port) it ...