This script is for my the first after install termux on my Smartphone.

first_install_termux.sh

#!/data/data/com.termux/files/usr/bin/bash

help_fuc(){
	echo -e "This script is my Autoscript to automatic install this things I needed.\n
		-c --config :Default config for my work\n
		-ob --openbox :half_automatic Install Openbox_WM and default tools\n
		-x4 --xfce :half_automatic Install Xfce4_DM and small default tools"
 
}

default_config(){
	
	# update and upgrade
	pkg upgrade -y

	#install programms
	apt install openssh wget vim rsync zsh tmux termux-api -y

	#termux settings editing
	sed -i 's/# shortcut.create-session = ctrl + t/shortcut.create-session = ctrl + t/g' .termux/termux.properties
	sed -i 's/# shortcut.next-session = ctrl + 2/shortcut.next-session = ctrl + 2/g' .termux/termux.properties
	sed -i 's/# shortcut.previous-session = ctrl + 1/shortcut.previous-session = ctrl + 1/g' .termux/termux.properties
	sed -i 's/# shortcut.rename-session = ctrl + n/shortcut.rename-session = ctrl + n/g' .termux/termux.properties
	termux-reload-settings
}

gui(){
	apt install x11-repo -y
	apt install tigervnc -y
	vncserver -localhost
}

openbox(){
	gui()
	apt install openbox pypanel xorg-xsetroot aterm -y
	echo -e "#!/data/data/com.termux/files/usr/bin/sh\n# Start Openbox.\nopenbox-session &" > ~/.vnc/xstartup
	echo -e "# Make background gray.\nxsetroot -solid gray\n# Launch PyPanel.\npypanel &" > ~/.config/openbox/autostart
}

xfce(){
	gui()
	apt install xfce4 xfce4-terminal -y
	echo -e "#!/data/data/com.termux/files/usr/bin/sh\nxfce4-session &"
}
if [ $1 == "--help" || $1 == "-h" ]then;
	help_fuc()
elif [ $1 == "--config" || $1 == "-c" ] then;
	default_config()
elif [ $1 == "--openbox" || $1 == "-ob" ] then;
	default_config()
	openbox()
elif [ $1 == "--xfce" || $1 == "-x4" ] then;
	default_config()
	xfce()
else
	echo -e $1 "not found\nUse \"--help or -h\""
fi