Matin matinrco

In Gnome, use these libs and command to make QT apps follow GTK theming better:

sudo apt install qt5-style-plugins

sudo bash -c "echo 'QT_QPA_PLATFORMTHEME=gtk2' >> /etc/environment"

Install socat :

sudo apt install socat

then :

socat -d -d TCP-LISTEN:8080,reuseaddr,fork,bind=localhost TCP:$(grep -m 1 nameserver /etc/resolv.conf | awk '{print $2}'):1080

here I make windows service running at 1080 port number accessible within WSL2 localhost:8080 (e.g proxy running on windows)

Windows

Add this to your ssh config file ( which is located in %USERPROFILE%\.ssh\config ) or create one if it's missing:

Http proxy & repo access via ssh:

Host *
    ProxyCommand "C:/Program Files/Git/mingw64/bin/connect.exe" -H {proxyserver}:{port} %h %p

or (for specific host name)

Host gitlab.com

Load OS related variables into shell:
```
. /etc/os-release
```

Add repo:

sudo sh -c "echo 'deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/Debian_${VERSION_ID}/ /' > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list"

Add apt key:

How to enable hidden GRUB menu?

On new Fedora 29 Workstation installs this will be enabled by default. If your system has been upgraded to F29 from an older release, you can enable it by running these commands:

On a system using UEFI booting ("ls /sys/firmware/efi/efivars" returns a bunch of files):

sudo grub2-editenv - set menu_auto_hide=1
sudo grub2-mkconfig -o /etc/grub2-efi.cfg

On a system using legacy BIOS boot:

Remove old kernels & modules & headers with dnf in fedora

List installed kernels

rpm -qa kernel* |sort -V

exmple output:

kernel-5.6.6-300.fc32.x86_64
kernel-5.8.11-200.fc32.x86_64

Install MongoDB 4.4.1 on WSL 2 (Debian 10/Buster - Ubuntu 20.04 LTS (Focal Fossa))

Download these `.deb` files :

Debian 10/Buster :
mongodb-org-database-tools-extra

Run OpenModelica GUI with Docker on Mac OS host

First you need docker , brew , XQuartz and socat on your host.
- docker : Install docker desktop from here
- brew : Follow installation instruction from here
- XQuartz : Install by : brew cask install xquartz
- socat : Install by : brew install socat
Now run this in new terminal :

socat TCP-LISTEN:6000,reuseaddr,fork UNIX-CLIENT:"$DISPLAY"

Set static ip address to raspberry pi eth0 (ethernet) in /etc/network/interfaces.d/eth0 :
```
auto eth0
iface eth0 inet static
    address 192.168.1.20/24
```
Uncomment IP forwarding from /etc/sysctl.conf :

net.ipv4.ip_forward=1

	// Insert some data
	db.product_categories.insertMany([
	{
	_id: 1,
	name: 'Products',
	parent_id: null
	},
	{
	_id: 2,
	name: 'Digital & Electronics',