x2go

install x2goserver on debian:

sudo apt update
sudo apt -y install x2goserver

install x2goclient on debian:

sudo apt -y install x2goclient

install x2goserver on almalinux 8 or 9:

dnf -y install yum-utils 
dnf config-manager --set-enabled crb
dnf -y install epel-release
dnf -y install epel-next-release
dnf -y install x2goserver

install x2goclient on almalinux8 or 9:

dnf -y install x2goclient

fix errors with sqlite:

chown root:x2gouser /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper
x2godbadmin --createdb
chmod g+s /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper

nomachine

install nomachine on archlinux:

git clone https://aur.archlinux.org/yay.git
cd yay
makepkg -si

install nomachine:

yay -S nomachine

edit file "/usr/NX/etc/server.cfg", set "StartNXDaemon" to "Automatic":

StartNXDaemon Automatic

then restart nxserver service:

systemctl restart nxserver

from another computer install nomachine:

https://download.nomachine.com/download/8.8/Windows/nomachine_8.8.1_1_x64.exe

https://download.nomachine.com/download/8.8/MacOSX/nomachine_8.8.1_1.dmg

https://download.nomachine.com/download/8.8/Linux/nomachine_8.8.1_1_x86_64.rpm

https://download.nomachine.com/download/8.8/Linux/nomachine_8.8.1_1_amd64.deb

to fix nxplayer for linux crashing when connecting to another machine edit this key in $HOME/.nx/config/player.cfg:

<option key="Enable hardware accelerated decoding" value="disabled" />