Post-Install

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Table of Contents

Debian 13 Trixie

Sudo

su
apt install sudo
/sbin/usermod -a -G sudo <username>

Exit root shell and relogin with your regular user.

Upgrade & Upgrade

sudo apt update
sudo apt upgrade

Networking

sudo apt install network-manager modemmanager

Optional - Network Manager VPN capabilities:

sudo apt install network-manager-openconnect network-manager-openvpn network-manager-strongswan

Edit /etc/network/interfaces file and comment out configured interfaces. Reboot.

nmcli device wifi connect <SSID> password <PASSWORD>

CLI applications

sudo apt install vim ncdu ranger unzip unrar-free

Audio & Video

sudo apt install pulseaudio ffmpeg mpv

Test webcam device:

ffmpeg -f v4l2 -i /dev/video0 -t 10 webcam-test.mkv

Development Tools

sudo apt install golang build-essential git tig npm

X11

sudo apt install xinit i3 i3status alacritty rofi firefox-esr
sudo apt install fonts-terminus

Edit ~/.xinitrc:

exec i3

Start X11:

startx

GTK Applications Look

GTK applications scaling in ~/.profile:

export GDK_SCALE=1.8
export GDK_DPI_SCALE=1.5

GTK applications theme settings in ~/.config/gtk-3.0/settings.ini:

[Settings]
gtk-application-prefer-dark-theme=true
gtk-button-images=true
gtk-cursor-theme-name=Breeze_Snow
gtk-cursor-theme-size=24
gtk-decoration-layout=icon:minimize,maximize,close
gtk-enable-animations=true
gtk-font-name=Dejavu Sans, 11
gtk-icon-theme-name=Adwaita
gtk-menu-images=true
gtk-modules=colorreload-gtk-module:window-decorations-gtk-module
gtk-primary-button-warps-slider=false
gtk-theme-name=Adwaita-dark
gtk-toolbar-style=3
gtk-xft-dpi=122880

QT Applications Look

August 13, 2025