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varqox /
Last active Apr 9, 2021
Guide for what to do just after installing a bare Arch Linux to get *my* full-fledged XFCE desktop Arch Linux and some other random Linux stuff

Before rebooting after making fresh Arch installation

  • make sure to install grub using grub-install and configure it properly using grub-mkconfig -o /boot/grub/grub.cfg (for uefi it is not so easy), but before running grub-mkconfig install intel-ucode or amd-ucode
  • install networkmanager vim htop net-tools wireless_tools # net-tools for ifconfig, wireless_tools for iwconfig
  • remember to configure pacman mirrors properly see /etc/pacman.d/mirrorlist
  • reboot

On a fresh Arch installation

  • systemctl enable --now NetworkManager
  • use nmtui to connect to internet
  • install git man-pages procps-ng # procps-ng for pkill
varqox /
Last active May 5, 2021
How to record multiple applications and microphone into one audio file on Linux using PulseAudio

How to record multiple applications and microphone into one audio file on Linux

Step 0. Terminology

Sinks are for output, sources are for input. To stream source to sink a loopback must be created. More shall you find there.

Step 1. Create output sink that will be recorded

Our output sink will be named recording.

pacmd load-module module-null-sink sink_name=recording sink_properties=device.description=recording
varqox / time_test.c
Last active Apr 27, 2019
Testy do trzeciego zadania zaliczeniowego z Systemów Operacyjnych
View time_test.c
// Krzysztof Małysa
#include <assert.h>
#include <errno.h>
#include <math.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
varqox /
Last active Apr 4, 2019
Network Manager enable wifi on ethernet (LAN) disconnect and disable it on ethernet (LAN) connect, works with openvpn (VPN) and disconnecting cable when laptop is suspended
# Place in file: /etc/NetworkManager/dispatcher.d/pre-up.d/
# Make the file safe for execution: sudo chmod 744 /etc/NetworkManager/dispatcher.d/pre-up.d/
if [ "$1" = "enp3s0" ]; then
rfkill block wifi # rfkill is used for unblocking, so we have to use it for blocking
varqox / crack_sound_fix.service
Last active Mar 20, 2019
Eliminates cracking sound on resume
View crack_sound_fix.service
Description=Eliminate cracking headphone sound
# Enable with: sudo systemctl enable --now crack_sound_fix.service
ExecStart=/usr/sbin/hda-verb /dev/snd/hwC0D0 0x1d SET_PIN_WIDGET_CONTROL 0x0
varqox /
Created Sep 16, 2018
Test of sqlite zipfile (disappointed me, so I switched to miniz)
// needs sqlite.h from sim's lib that is not in simlib
#include "lib/simlib/sqlite3/sqlite3.h"
#include "lib/simlib/sqlite3/zipfile.h"
#include <simlib/filesystem.h>
#include <simlib/sqlite.h>
class Zip {
SQLite::Connection conn_;
varqox / 50-foo.rules
Last active Apr 13, 2019
Useful script to save some power when on battery by stopping some applications
View 50-foo.rules
# When on battery stop some applications from eating the power
# Install with: sudo install -Dm 0644 50-foo.rules /lib/udev/rules.d/
# SUBSYSTEM=="power_supply", ATTR{status}=="Discharging", RUN+="/usr/sbin/killall -STOP Discord alarm-clock-applet ksysguard clementine"
# SUBSYSTEM=="power_supply", ATTR{status}!="Discharging", RUN+="/usr/sbin/killall -CONT Discord alarm-clock-applet ksysguard clementine"
SUBSYSTEM=="power_supply", ACTION=="change", ATTR{online}=="0", RUN+="/usr/sbin/pkill -STOP --exact ksysguard"
SUBSYSTEM=="power_supply", ACTION=="change", ATTR{online}=="1", RUN+="/usr/sbin/pkill -CONT --exact ksysguard"
# Run kayboard normalizer
# SUBSYSTEM=="input", SUBSYSTEMS=="usb", ACTION=="add", RUN+="/home/quasar/Documents/scripts/"
varqox /
Last active Sep 11, 2020 — forked from ephemient/⁄etc⁄pacman.d⁄hooks⁄linux-modules-post.hook
(Arch Linux) Keep current modules around during kernel upgrade ("30" is in the name to run before DMKS remove ("90" for install) when upgrading kernel)
# Run: curl '' | sudo sh
curl '' | sudo tee /usr/share/libalpm/hooks/30-linux-modules-pre.hook
curl '' | sudo tee /usr/share/libalpm/hooks/90-linux-modules-post.hook
curl '' | sudo tee /etc/tmpfiles.d
varqox /
Last active Apr 18, 2018
Fast socket I/O stream for my team at PIZZA 2018
// Krzysztof Małysa
#include <array>
#include <cassert>
#include <condition_variable>
#include <cstring>
#include <fcntl.h>
#include <mutex>
#include <netdb.h>
#include <netinet/in.h>
#include <poll.h>
varqox /
Last active Jan 3, 2017
Scans ports in range to check which are available to use, you have to run it on the server side and the client side
#include <arpa/inet.h>
#include <csignal>
#include <poll.h>
#include <simlib/config_file.h>
#include <simlib/debug.h>
#include <simlib/filesystem.h>
#include <simlib/process.h>
#include <sys/resource.h>
// Krzysztof Małysa