the installer of ftp on the raspberry pi

vsftp_installer.sh

#!/bin/bash

#https://blog.ukrnames.com/administrirovanie/nastroyka-i-ustanovka-vsftpd
#https://www.benscobie.com/fixing-500-oops-vsftpd-refusing-to-run-with-writable-root-inside-chroot/
#https://www.systutorials.com/39549/changing-linux-users-password-in-one-command-line/

if [ "$(whoami)" != "root" ]; then
	echo "Run script as ROOT please. (sudo !!!)"
	exit
fi

sudo apt-get update
sudo apt-get -y upgrade
sudo rpi-update
sudo apt-get install -y vsftpd
sudo /etc/init.d/vsftpd stop

read -p "ftp username [default: ftppi]:" ftpUser
ftpUser=${ftpUser:-ftppi}
read -p "ftp user password [default: ftppi]:" ftpUserPass
ftpUserPass=${ftpUserPass:-ftppi}
read -p "ftp user dir [default: /home/$ftpUser/]:" ftpUserDir
ftpUserDir=${ftpUserDir:-/home/$ftpUser/}

echo "ftp username: $ftpUser"
echo "ftp user password: $ftpUserPass"
echo "ftp user dir: $ftpUserDir"

sudo mkdir -p $ftpUserDir
sudo ls -la $ftpUserDir
sudo chmod 775 $ftpUserDir
sudo chmod a-w $ftpUserDir

#sudo groupadd ftpusers
#sudo usermod -G webusers user

sudo useradd -d $ftpUserDir -s /bin/bash $ftpUser
echo -e "$ftpUserPass\n$ftpUserPass" | passwd $ftpUser
#sudo useradd -d $ftpUserDir -s /bin/bash $ftpUser -p $ftpUserPass
#echo $ftpUserPass | sudo passwd $ftpUser --stdin

sed -i 's/^anonymous_enable=YES/anonymous_enable=NO/'                                /etc/vsftpd.conf
sed -i 's/^#local_enable=YES/local_enable=YES/'                                      /etc/vsftpd.conf
sed -i 's/^#write_enable=YES/write_enable=YES/'                                      /etc/vsftpd.conf
sed -i "0,/^#chroot_local_user=YES/s/^#chroot_local_user=YES/chroot_local_user=YES/" /etc/vsftpd.conf

sudo /etc/init.d/vsftpd restart