kali-live-build/kali-config/common/includes.chroot/usr/lib/live/config/0031-kali-user-setup

#!/bin/sh

configure_zsh() {
    # Stop if zsh is not present
    if [ ! -x /usr/bin/zsh ]; then
	return
    fi
    # Stop if user has opted out of zsh
    if echo "${LIVE_CONFIG_CMDLINE}" | grep -qs 'nozsh'; then
	return
    fi
    chsh --shell /usr/bin/zsh kali
    chsh --shell /usr/bin/zsh root
}

configure_usergroups() {
    # Ensure those groups exist
    addgroup --system kaboxer || true
    addgroup --system wireshark || true

    # adm - read access to log files
    # dialout - for serial port access
    # kaboxer - for kaboxer
    # vboxsf - shared folders for virtualbox guest
    # wireshark - capture sessions without being root
    kali_groups="adm dialout kaboxer vboxsf wireshark"

    for grp in $kali_groups; do
	getent group $grp >/dev/null || continue
	usermod -a -G $grp kali
    done
}

pkg_installed() {
    dpkg -s "$1" 2>/dev/null | grep -q "ok installed"
}

configure_terminal() {
    while read -r desktop terminal; do
	pkg_installed kali-desktop-$desktop || continue
	update-alternatives --verbose --set x-terminal-emulator /usr/bin/$terminal || true
	break
    done <<END
e17   terminology
gnome gnome-terminal.wrapper
i3    kitty
kde   konsole
lxde  lxterminal
mate  mate-terminal.wrapper
xfce  qterminal
END
}

# Avoid configuring multiple times in case persistence is enabled
if [ -e /var/lib/live/config/kali-user-setup ]; then
    exit 0
fi

# Set "kali" as password for the user kali
usermod -p 'AqLUsDitNnTsw' kali

# Apply various configuration
configure_zsh
configure_usergroups
configure_terminal

# Remember that this script has been run
touch /var/lib/live/config/kali-user-setup