Linux puskom-ProLiant-DL385-Gen10 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64

//etc/gtk-3.0/settings.ini

 [Settings]
gtk-theme-name = Ambiance
gtk-icon-theme-name = ubuntu-mono-dark
gtk-sound-theme-name = ubuntu
gtk-icon-sizes = panel-menu-bar=24,24