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Redshift Night Light For Linux

Install Packages

sudo pacman -S redshift

Create Geoclue Service

cd ~/.config/systemd/user touch geoclue-agent.service

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Thinkpad T470 Fingerprint Scanner Setup

Install Python Validity

yay -S python-validity
reboot

Enroll Fingerprints

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WSL2 (Focal Fossa) Puppeteer Dependencies

complete one-liner

sudo apt install libnss3 libxss1 libasound2 libatk-bridge2.0-0 libgtk-3-0

if you encounter an error message regarding libgbm or any other dependencies you can search it's name on apt and install it.

error messages

error while loading shared libraries: libnss3.so: cannot open shared object file: No such file or directory

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WSL2 Common Problems Fixes

Hash Sum Mismatch

• when performing the standard sudo apt update and installing a package often you might see an error message that stating it failed to fetch the package due to checksum mismatch
• upon further researh on the ubuntu forms, the issues seems to be related to SHA256 optimization introduced from libcrypt20

gcrypt solution:

sudo su -
apt-get clean

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WPA Enterprise / University Wi-Fi Networks

This document serves as a guide for authenticating and connecting towards enterprise level or university wireless networks. From a linux host using NetworkManager and the nmcli tool.

Add Connection Profile

nmcli connection add type <wifi/ethernet> ifname <wlp4s0/wlan0> con-name <profile-name> ssid <wifi-ssid>

Turn on DHCP

nmcli connection edit 

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Linux Problems

popping sound when playing audio on headphones

• this is caused by 'power-saving' enabled by default on audio devices.
• when playback is paused the audio device gets turned off, and upon resuming playback the devices gets a surge of power which causes the speaker drums to pop.

TLP solution:

sudo pacman -S tlp tlp-rdw
sudo systemctl enable tlp --now

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UEFI Encrypted Arch Linux (10/2021)

Bootable USB

1. lsblk - list block devices
2. sudo umount /dev/sdx - ensure usb is not mounted
3. sudo dd bs=4M if=path/to/input.iso of=/dev/sdx oflag=sync status=progress

Check UEFI Support

• ls /sys/firmware/efi/efivars
• if the directory exist then UEFI is supported

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QEMU-KVM in Arch Linux

Check Virtualization Support

lscpu | grep -i Virtualization

• VT-x for Intel
• AMD-Vi for AMD

Ensure that your kernel includes KVM modules

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How to make a bootable USB

Requirements

1. Any USB drive, preferably SanDisk (Cruzer Edge/Switch)
   
2. Computer running Linux / Windows 10
   

Linux

1. Insert the USB to your linux file system
2. Execute umount /dev/sdX if it is auto-mounted.
3. Use the dd utility to copy your image to the use device.

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Arch Linux LEMP Stack

Install NGINX Web Server

1. sudo pacman --noconfirm -S nginx
2. sudo vim /etc/nginx/nginx.conf

// Modify the following
location / {
   root           /usr/share/nginx/html;
   index          index.html index.php;