nano /etc/apt/sources.list

sources.list

deb http://ftp.de.debian.org/debian/ jessie main
deb-src http://ftp.de.debian.org/debian/ jessie main
 
deb http://security.debian.org/ jessie/updates main
deb-src http://security.debian.org/ jessie/updates main
 
# jessie-updates, previously known as 'volatile'
deb http://ftp.de.debian.org/debian/ jessie-updates main
deb-src http://ftp.de.debian.org/debian/ jessie-updates main
 
# jessie-backports
deb http://ftp.debian.org/debian jessie-backports main

apt update
apt install open-vm-tools -y
apt install openssh-server -y
mkdir /root/.ssh
nano /root/.ssh/authorized_keys
apt install ntp ntpdate -y
nano /etc/ntp.conf
apt install mc htop tcpdump nmap tree pwgen lvm2 xfsprogs unattended-upgrades ncdu -y