MKRhere/wiki

A personal repository for common problems and solutions.

I created this repo so that I don't have to go back and lookup solutions to problems I've already encountered. Feel free to use this repo if it solves your own problems, and raise an issue if you think something can be less hacky or retarded.

Table of contents

• Debian GNU/Linux
  • Nvidia drivers
  • OBS with NVENC
  • Intel WiFi drivers
  • MongoDB
  • nodejs
    • Installing and using nvm nvs
  • PulseAudio
  • Peek
  • resolv.conf
  • RabbitMQ Server
  • _MISC

Debian GNU/Linux

NVIDIA drivers with CUDA

Don't fight it. Just download the entire bundle from NVIDIA. Get the latest CUDA deb URL from https://developer.nvidia.com/cuda-downloads and follow the instructions below:

wget https://developer.download.nvidia.com/compute/cuda/11.7.0/local_installers/cuda-repo-debian11-11-7-local_11.7.0-515.43.04-1_amd64.deb
sudo dpkg -i cuda-repo-debian11-11-7-local_11.7.0-515.43.04-1_amd64.deb
sudo cp /var/cuda-repo-debian11-11-7-local/cuda-*-keyring.gpg /usr/share/keyrings/
sudo add-apt-repository contrib
sudo apt-get update
sudo apt-get -y install cuda

OBS with NVENC

Once you've installed NVIDIA drivers with CUDA support above, do this (adapted from Arch Wiki):

NVENC requires the nvidia_uvm module and the creation of related device nodes under /dev. Invoking the nvidia-modprobe utility automatically creates them. You can create /etc/udev/rules.d/70-nvidia.rules to run it automatically:

/etc/udev/rules.d/70-nvidia.rules

ACTION=="add", DEVPATH=="/bus/pci/drivers/nvidia", RUN+="/usr/bin/nvidia-modprobe -c0 -u"

Running nvidia-modprobe -c0 -u once also does it.

After ensuring /dev/nvidia-uvm exists, install OBS from Flatpak to save the trouble of installing it by hand. Choose NVENC and hit record. It just works now!

Intel WiFi drivers

Intel WiFi drivers are not included in the Debian official repos. They are only available from the non-free repo.

echo "deb http://httpredir.debian.org/debian/ stretch main contrib non-free" >> /etc/apt/sources.list
sudo apt-get update
sudo apt-get install firmware-iwlwifi

MongoDB

MongoDB has Debian Buster packages now, which works fine on Debian Bullseye.

nodejs

Install Node globally from Nodesource:

# Using Debian
sudo su
curl -fsSL https://deb.nodesource.com/setup_18.x | bash -
apt-get install -y nodejs

Install Node locally (preferred) using NVS:

export NVS_HOME="$HOME/.nvs"
git clone https://github.com/jasongin/nvs "$NVS_HOME"
. "$NVS_HOME/nvs.sh" install

PulseAudio

Had an issue on Debian Stretch on my Dell PC where pulseaudio daemon won't autostart. This solved the problem each time:

pulseaudio --start
sudo killall -9 pulseaudio
sudo systemctl --user enable pulseaudio.socket
pulseaudio --start

Peek

Peek is a GIF recorder for Linux.

There are no official Debian packages, yet, but you can easily create your own .deb package for Peek. First, install the build dependencies:

sudo apt install cmake valac libgtk-3-dev libkeybinder-3.0-dev libxml2-utils gettext txt2man

Then build Peek and package it:

git clone https://github.com/phw/peek.git
mkdir peek/build
cd peek/build
cmake -DCMAKE_INSTALL_PREFIX=/usr -DGSETTINGS_COMPILE=OFF ..
make package

This will create the package peek-x.y.z-Linux.deb (where x.y.z is the current version). You can install it with dpkg:

sudo dpkg -i peek-*-Linux.deb

resolv.conf

Trouble with random daemons overwriting resolv.conf? Unsure if it's network manager or netconfig or dhcpcd? Simple hack:

chattr +i /etc/resolv.conf

Note to future self: If later you found the right way to do this, reverse the above by doing chattr -i /etc/resolv.conf and fix it.

Future self:

To add nameservers before resolv.conf, add prepend domain-name-servers 127.0.0.1; to /etc/dhcp/dhclient.conf.

As implied, nameserver 127.0.0.1 is prepended to /etc/resolv.conf

_MISC

Useful Linux commands

• Information about graphic card:
  • sudo lspci -v -s 01:00.0
  • inxi -Gx
• List all shell commands available compgen -c (use with grep?)