OS-Shit

Random OS Bullshit

Linux Bullshit

Audio Rescan

removes audio PCI-E device and then re-scans for it

echo 1 > /sys/bus/pci/devices/0000\:00\:1f.3/remove
echo 1 > /sys/bus/pci/rescan

Script run on resume from Suspend of Hibernate

Run on Resume to have a script run on resume from suspend/hibernate copy it to /lib/systemd/system-sleep/

More recent OpengL version on Spice Server display server

Virtual OpenGL Driver

Refresh Udev Rules

udevadm control --reload-rules && udevadm trigger

GPU Drivers

Requires Secure Boot to be disabled (Nvidia)

Intel: Indirect Branch checking

for nvidia prorietary drivers to work for a lot of distros past kernel 5.18 in kernal command arguments ibt=off needs to be set.

Disabling nvidia GPU

huh envycontrol just kinda works for switching gpus

NVIDIA driver preventing linux from loading (specifically Xserver)

solution was in /etc/default/grub adding nomodeset to LINUX_CMDLINE_DEFAULT= prefereably just use an linux-nvidia type kernel image

Video Hardware Acceleration playback

https://reddit.com/r/linux/comments/xcikym/tutorial_how_to_enable_hardware_video/

Git

Tmux

if you have a nested tmux session to get tmux commands into the inner session use the prefix key twice before you do ur tmux command

Network

Rsync bullshit

for rsync syntax like rsync <1>/<2>/<3> <dest>:<4> it will copy copy <1>, and <2> to the destination folder not just <3>, u need to run a cd <1>/<2>/ then a your rsync <3> <dest>:<4> `

Netplan instead if NetworkManager isn't enabled

so if ur not running NetworkManager and /etc/netplan/ is empty all network devices will show up as off in networkctl

Netplan ignore ip lease

add ignore-carrier: true to netplan for each interface you want to have ignore the waiting for ip to get leased

Utilizing a Linux box as a gateway rather than a switch/router

to use a linux machine as a gateway where Internet ---- Linux machine ---- ur machine u need somewhere in nmcli connection show <wired connection> to have the field ipv4.method be set to shared and on ur machine u need to set ur ip to one under the subnet of the Linux machine with the ipv4.routes and ipv4.gateway set to the ip of the Linux machine u can do it without shared u just need to set routes for all child machines off ur Linux machine (edited)

nmcli connection add con-name direct ipv4.gateway 10.42.0.1 ipv4.addresses 10.42.0.2/24 ipv4.method manual ipv4.routes 10.42.0.1 type ethernet example command for ur machine

for u master machine a command like nmcli connection add con-name children ipv4.addresses 10.42.0.1/24 ipv4.method shared master <the interface device like eno1> type ethernet should work

its a bit different if u do it through netplan since u have to manually set the routes not do the ipv4.method shared arg

Reference

No swtich Network Topologies RedHat setting statuc routes

Sudo Stupid

sudo -S lets u pipe in the password from stdin

Qt application segfaults with error saying incompatable Qt version

force update/rebuold qt5-styleplugins

ffmpeg

.ogg to .mp3 metadata retainment

if u want to retain metadata when converting from .ogg to .mp3 with ffmpeg u'll need to add these args -map 0 -map_metadata 0:s:0 -id3v2_version 3 -write_id3v1 :))

Discord

if discord wants you to update, just sudoedit /opt/discord/resources/build_info.json and increment the version field

Qt complying with GTK theme

for qt apps to follow ur gtk icon theme rather than forcing it to follow ur gtk theme with export QT_QPA_PLATFORMTHEME="gtk2" use export QT_QPA_PLATFORMTHEME="qt5ct" and use the qt5ct package to set it to follow gtk2 which lets u set the icon theme separately

CPU Control

echo 0 > /sys/devices/system/cpu/cpu#/online will disable a cpu core note: u cant disable cpu0

Bullshit battery management

the most annoying this for reason in udev rules some form environment vars gets messed up so setting up a udev rule to shut down all cores but 2 goes like: writning the udev rule 60-powerCPUmgmt.rules to /etc/udev/rules.d/:

#Rule for switching to BAT0
SUBSYSTEM=="power_supply",ENV{POWER_SUPPLY_ONLINE}=="0", RUN+="/bin/batCPU"

#Rule for switching to AC
SUBSYSTEM=="power_supply",ENV{POWER_SUPPLY_ONLINE}=="1", RUN+="/bin/batCPU"

with batCPU being:

#!/usr/bin/bash
[[ $(cat /sys/class/power_supply/AC/online) -eq 0 ]] && \
	(for i in $(seq 2 11); do echo 0 > /sys/devices/system/cpu/cpu$i/online; done) || \
	(for i in $(seq 1 11); do echo 1 > /sys/devices/system/cpu/cpu$i/online; done)

where 11 is whatever the max cpu index on your device is I would use nproc to determin the max cpu dynamically but udev shits itself and will only stop cores 2-6

Systemd Service for on Startup

[Unit] 
Description=Enables X number of Cpus dependant on power state 

[Service] 
Type=simple 
RemainAfterExit=yes 
Execstart=/bin/batCPU 

[Install] 
WantedBy=default.target

Pacman

PGP sigs

if you come across a invalid or corrupted package (PGP signature) or something along those lines run a pacman -S archlinux-keyring and then pacman -Syu

Head-ass Windows

Chocolaty Powershell install

Set-ExecutionPolicy Bypass -Scope Process -Force; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))

SSH pubkey setup

1. install openssh server with Add-WindowsCapability -Online -Name OpenSSH.Server~~~~0.0.1.0
2. start and enable the sshd service with Start-Service sshd and Set-Service -Name sshd -StartupType 'Automatic'
3. allow it through the firewall New-NetFirewallRule -Name 'OpenSSH-Server-In-TCP' -DisplayName 'OpenSSH Server (sshd)' -Enabled True -Direction Inbound -Protocol TCP -Action Allow -LocalPort 22 now openssh is installed on your client machine
4. copy ur ssh key with scp id_rsa.pub <user>@<hostname/ip>:%programdata%/ssh
5. now ssh into the windows machine from ur client machine and cd %programdata%/ssh
6. run type id_rsa.pub >> administrators_authorized_keys now u'll need a cli editor like vim or nano refer to [[Linux bullshit#Chocolaty Powershell install]] on chocolaty install then run chocolaty install <editor>
7. once u have a cli editor run <editor> sshd_config and uncomment the line with #PubkeyAuthentication yes
8. restart the sshd service with Restart-Service sshd within powershell