Questions tagged [udev]
The udev tag has no usage guidance.
111
questions
2
votes
1
answer
108
views
RHEL8: How to use UDEV to set SR-IOV VF Interface name
The SR-IOV VF is persisted over boot with
nmcli connection modify <PF> sriov.total-vfs 3
nmcli connection modify <PF> connection.autoconnect true
Then it would create VF interface names ...
- 151
0
votes
0
answers
10
views
detect when sssd connects to the ladp server and finds a specific group in boot
I am looking to find a way so when system is booting , i can detect when sssd connect to LDAP server and finds a specific group then reload the systemd-udevd.
i actually want to automate all of these ...
- 1
1
vote
0
answers
59
views
Swap disk devices in RHEL 8
I need to swap a couple of disk devices around on a RHEL 8 server because it's unfortunately going to be problematic to rebuild it and I need the devices in a specific order.
I think the following ...
- 11
0
votes
0
answers
125
views
Allow a systemd service access to /sys/…/energy_uj - udev rule changing owner having no effect?
I'd like to collect the my CPU power usage on some "plain" linux boxes (i.e. no fancy things like VMs or let alone K8s) via scaphandre or prometheus_node_exporter, running as systemd service ...
- 111
0
votes
2
answers
59
views
Howto prevent udevd wrongly enqueues remove event for device ppp?
Connecting a PDA device with Debian using SynCE, USB serial device is recognized and connects with ttyUSB bus, obtains an IP address and disconnects after a few seconds (two, max three).
This is how ...
- 1
6
votes
2
answers
437
views
How to name drives according to their position in a multi-bay enclosure?
It is important to know a position of a bad drive in a multi-bay device, however default naming of drives e.g /dev/sda, /dev/sdb etc. does not provide a clue where a particular drive is residing ...
- 327
0
votes
0
answers
90
views
udev rule/script to suppress kernel event
I am in need of a method (udev rule and/or script) that will effectively suppress a kernel event that is crashing my display manager.
I have been successful suppressing the kernel event manually by:
...
- 173
0
votes
1
answer
195
views
During which dracut hook can a PXE client rename predictable interfaces names with a udev rule?
tl;dr: During load of an initramfs (execution of dracut modules) on a PXE client, I need to rename the kernel-given (predictable) interface names (right now they're unpredictable ethX names). This way,...
0
votes
2
answers
545
views
How to deal with dynamic drive name when device mounting hard drives to LXC on Proxmox?
Question
Setup
On a Proxmox server I create an LXC container with:
pct create 101 local:vztmpl/centos-8-default_20201210_amd64.tar.xz --features mknod=1,nesting=1,fuse=1 --ostype centos --storage=CTVM ...
- 101
0
votes
2
answers
72
views
Permissions of /dev/null wrong in KVM guest
My host node is RHEL7 running KVM from the 'updates' repo. On the host node, the permissions for /dev/null are:
crw-rw-rw-. 1 root root 1, 3 Dec 18 04:45 /dev/null
In an Alpine KVM guest (5.14, but ...
- 1,445
0
votes
0
answers
158
views
Remote access to `/dev/input` fails with permission error
I need to open a USB game controller device (joystick) remotely. This device is physically connected to server and is available for local user with permissions:
crw-rw-r--+ 1 root input 13, 0 ** /dev/...
- 1
-1
votes
1
answer
145
views
Why are some of my Secondary IPs missing after a YUM update on Amazon Liunx 2
On Sunday, I did a Yum Update on my Amazon Linux 2 instance (a T2.Medium) and after the update only 2 IP addresses per interface were working. Before the update I had 6 IPs per interface. It looks ...
- 213
0
votes
0
answers
90
views
USB Drive at the same location on FreeBSD
I have a number of USB drives that are attached to a FreeNAS server. These are then used as offline backup targets. One problem is that the order that the drives are plugged into matters.
On a Linux ...
- 131
0
votes
1
answer
56
views
Debian/Ubuntu, inconsistency between S-ATA ports numbering and /dev/sdX lettering [closed]
The hardware situation is as such :
a motherboard (MSI X99A SLI Plus),
two (2) Samsung 860 Pro SSDs connected on SATA-1 and SATA-2 of the motherboard.
five (5) identical HDDs connected on SATA-3, ...
2
votes
0
answers
168
views
Autofs and udev rules to restrict usb permissions to groups
I need some help trying to figure out how to restrict the reading and writing access of usb devices.
There are two groups on my system:
usbreaders: only should have rights to access and read the usb
...
- 35
0
votes
0
answers
548
views
How to populate /dev/input?
I have a fully working (for this part) embedded system based on a rather ancient, vendor-modified, Linux v3.18.29.
To solve other problems I am in the process of upgrading everything to current u-...
- 296
0
votes
1
answer
4k
views
udev rules not working
sorry for my English....
I am with Linux Mint
I to try to change my interface name but without result...
The steps which I to does...
First search for my interface name and mac from it,
ip a
to ...
- 3
1
vote
0
answers
316
views
LV creation on CentOS 7.7
[root@kvm3 ~]# lvcreate -L 2G storage-3 -n testing
/dev/storage-3/testing: not found: device not cleared
Aborting. Failed to wipe start of new LV.
It works fine with the following -Z option.
[...
- 59
1
vote
0
answers
493
views
If statements in udev rules
Is it possible to make statements in udev rules via if, else or case?
I imagine something like:
if [ $HOSTNAME == "host1" ]
then
ATTRS{idVendor}=="04a9", ATTRS{idProduct}=="", SUBSYSTEMS=="usb", ...
- 135
9
votes
3
answers
6k
views
How to determine "Predictable Name" of network interface
I am setting up a new server and installed Ubuntu Bionic, which uses Predictable Network Interface Names.
The installer is running on a rescue system, which still uses old interface names like eth0, ...
- 255
0
votes
0
answers
102
views
X-Org Server - Identify USB Unplug event
In our X-Org server setup, if the server is running and we unplug the USB Mouse then the server doesn't really do anything (no errors or warnings.) If we replug the device, even then the server doesn'...
- 101
2
votes
2
answers
736
views
Assign static id to usb printer
I have three usb receipt printers from the same vendor (thus the same usb vendor and product id) plugged into the same server and I need to be able to issue separate printing commands to each of them. ...
- 141
1
vote
1
answer
321
views
Dont use /dev/sd* for removable device
Today I almost erased my system with dd because I was going to write on my internal HDD (/dev/sdb*) instead of the removable usb (/dev/sdc*).
I want to make a udev rule to set any block usb under a ...
- 111
1
vote
1
answer
1k
views
Start Webcam App With Systemd On Linux
I have a simple application which streams video with a webcam called "streamer". I'd like to start "streamer" when my Linux device boots with systemd.
Next, I have the following systemd, service file,...
1
vote
1
answer
831
views
Why does /dev/disk/by-id directory have cdrom device only and which one of /dev/disk/by-X is recommended for creating zfs pools?
Im running a ubuntu 16.04 machine in esxi enviroment, i am going through zfs on linux faq and it recommends to use /dev/disk/by-id for home servers due to inconsistent nature of /dev/sdX names but ...
- 616
0
votes
1
answer
792
views
How to findout if haldaemon is being used or udev in RHEL server?
I am quite confused if hal is really in use or just udev.
What I understood:
In general, HAL is an abstraction layer that allows an operating
system to interact with a hardware device.
And daemon ...
- 681
0
votes
1
answer
290
views
Right network interface autodetect and get dhcp while boot
While preparing the mini forensic system I hung on a problem:
Let us imagine, we prepare a usb-flash booted linux for lot of diferent workstations. While setting up the network (ipv4 dhcp) we can find ...
- 263
3
votes
2
answers
3k
views
SATA disks being identified as SCSI
I have two identical servers with same hardware and cloned Linux OS. They both have Supermicro HBA AOC-S3008L. Yet one server identifies SATA disks as SCSI while the other one correctly identifies ...
0
votes
0
answers
696
views
Run script after plugging in USB device of certain vendor ID and product ID
I have a USB device and I need to execute a "infinite" script when I plug in this device and pass the /dev/... path as an argument.
The real example is: The device is RFID reader (0403:6001), which ...
- 1,677
1
vote
1
answer
724
views
swapon & hibernate on power key
I have a laptop & I run Arch Linux. My laptop has a spinning hard drive rather than an SSD, so I hate swap. However, I need one to hibernate, and I want my laptop to hibernate every time power key ...
- 121
3
votes
2
answers
830
views
Loopback interface is renamed to rename1
On my Ubuntu 17.04 Server the Loopback Interface keeps beeing renamed to "rename1" during boot (Syslog: rename1: renamed from lo).
I tried to disabling renaming by editing grub.conf: ...
- 31
0
votes
2
answers
3k
views
Why does udevadm not provide me a disk serial number when hdparm can?
Compare:
root@home:~# hdparm -I /dev/sdb | grep Serial
Serial Number: WCJ025C8
Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3....
- 289
2
votes
0
answers
536
views
Automount ATA/SCSI drives with systemd
I am attempting to automatically mount all ATA/SCSI drives on boot using systemd and udev without utilizing /etc/fstab.
This is necessary because filesystems need to be mounted on directories named ...
- 171
1
vote
0
answers
194
views
Scriptless automount for systemd Linux systems
What is the proper way to do a boot/hot-plug automount for ATA and USB storage devices on Linux systems using systemd without requiring a GUI or a user having to be logged in?
It seems that calling ...
- 171
2
votes
2
answers
7k
views
Change interface mac (hw) address using udev rules
I want to set a specific ethernet MAC address for an interface using UDEV rules. I have the following rule:
SUBSYSTEM=="net", ACTION=="add", ATTRS{serial}=="50B123", ATTR{address}="00:22:33:44:55:AA", ...
- 870
1
vote
0
answers
61
views
gnome -- create symlinks when mounting a file system
I'm not 100% sure where the problem is... udev or gnome or ...
Backstory:
I have an "IronKey". I have a udev rule that allows my IronKey to plug into my machine. After I've plugged it in, I go to ...
- 424
0
votes
0
answers
302
views
apt-get upgrade fails because of max recursion on udev
When i´m doing a apt-get upgrade on my debian jessie ( a vserver from hetzner) machine, i get an error on upgrading the udev package.
The Error Output starts with this:
addgroup: Die Gruppe »input« ...
- 101
5
votes
1
answer
2k
views
Calling lvcreate from inside the container hangs
I run a container. It has all the capabilities and mounts all the directories from root (except /proc). When I call lvcreate from inside of it I get:
# lvcreate -v -L104857600B -n vol1 default
...
- 135
1
vote
3
answers
3k
views
Add swap partition on zram device using udev rule
System: CentOS 7
cat /etc/udev/rules.d/10-zram.rules
ACTION=="add", SUBSYSTEM=="block", KERNEL=="zram0", DRIVER=="", ATTR{disksize}=="0", ATTR{disksize}="512M", RUN+="/usr/bin/systemd-run /sbin/...
- 3,148
1
vote
1
answer
1k
views
Udev rule for changing 'max_sectors_kb' for all 'sd*' devices
I am having a problem creating a udev rule that sets max_sectors_kb to 1024 for sd* (sda,sdb,sdc etc...) devices under /sys/block/.
Specifically, a recent kernel change means the max IO is too large ...
- 1,011
7
votes
4
answers
22k
views
mdadm software RAID isn't assembled at boot during initramfs stage
First, I prefer to mention I've found and read this.
I'm running Debian Jessie with a standard 3.16 kernel.
I've manually defined a RAID1 array. But it is not assembled automatically at boot time. ...
- 69
3
votes
2
answers
2k
views
Arch cryptsetup hangs on 'waiting for zero'
Cryptsetup was working flawlessly for months, but something I did today on my system now makes it hang:
# cryptsetup --debug --verbose luksOpen /dev/sdb home --key-file=/home.key --verbose
...
Key ...
- 171
3
votes
0
answers
499
views
Control /dev/pts/* assignments
I am trying to find a way to create a udev rule for a network connected terminal? Basically I need the rule to say a specific MAC address, or IP, is always assigned pseudo terminal /dev/pts/5 for ...
- 31
6
votes
1
answer
1k
views
udev rule not applied on boot for mounted disk
I'm trying to persist a readahead rule on a mounted drive to use with mongodb.
The mount is persisted using /etc/fstab and that works as expected.
I have added a udev rule ACTION=="add", KERNEL=="...
- 161
0
votes
1
answer
893
views
Is it possible to write a udev rule to keep other udev rules from running?
This
http://reactivated.net/writing_udev_rules.html
says
It is important to understand that udev will not stop processing when it finds a matching rule, it will continue searching and attempt ...
- 2,198
1
vote
1
answer
2k
views
Disk renaming udev rule
I have two separate controllers, SATA and PATA.
I would like to rename drives connected to the PATA to hd[a-z], and their partitions to hd[a-z][0-9].
# udevadm info -a -p /sys/block/sdd
[...]
...
- 11
2
votes
0
answers
39
views
Can 'or' logic be used in UDEV for mounting drive with unique UUIDs?
We do a back-up to a LaCie external rugged drive. The drive is then swapped with it's twin in the safe deposit box. While the drives have different serial numbers, for the servers purposes they are ...
- 965
0
votes
2
answers
263
views
Posix map fs path to syspath
Is there a safe way to map a filesystem path to a /sys/block/ node.
For instance on my system (Ubuntu) my / path is mounted from /dev/disk/by-uuid/7f6a93a7-1e63-48a3-a7e3-b336a2f9dbf7 which is a ...
1
vote
1
answer
722
views
Script triggered by udev to examine partition tables and test if it's a ceph disk
I'm wanting to trigger using udev under CoreOS a script on disk add/remove.
The purpose/goal is to automatically mount ceph data partitions to a specific directory in preparation for starting/...
- 14.5k
5
votes
0
answers
423
views
udev attribute cannot be set on boot
I'm setting up SR-IOV for my Intel I350 igb on CentOS 6.6 (2.6.32-504.el6.x86_64, udev 147) using udev. I have modified a rule I used in CentOS 7 (3.10.0-123.el7.x86_64, udev 208). When I do "udevadm ...
- 151