systemctl stop apache2

sed -i "s#\[mysqld\]#\[mysqld\]\ninnodb_fast_shutdown = 0#" /etc/mysql/my.cnf
systemctl stop mysql
systemctl start mysql
mysqldump -u root -p -A > /root/backup_mysql.sql

apt update
apt upgrade
sed -i "s#jessie#stretch#" /etc/apt/sources.list
apt update
apt upgrade
apt-get dist-upgrade

reboot

a2dismod php5
a2enmod php7.0
systemctl restart apache2

#todo :
# fix fail2ban
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