sshconfig:
Host d1
User andreyvit
HostName xxx.xxx.xxx.xxx
ControlPath ~/.ssh/master-%r@%h:%p
Create user:
apt-get update
apt-get upgrade
apt-get install mosh
hostnamectl set-hostname d1.tarantsov.com
apt-get install figlet
figlet 'dee one' | tee /etc/motd
$ ssh root@d1
adduser andreyvit # refuse to set a password
addgroup admin
adduser andreyvit admin
VISUAL=vim visudo
# change this:
%admin ALL=(ALL) ALL
%sudo ALL=(ALL:ALL) ALL
# into this:
%admin ALL=(ALL) NOPASSWD:ALL
%sudo ALL=(ALL:ALL) NOPASSWD:ALL
su andreyvit
mkdir -m700 .ssh
cat >.ssh/authorized_keys
chmod 600 .ssh/authorized_keys
Verify that you can login:
$ ssh d1
Disable root and password logins:
sudo perl -i -pe 's/^PermitRootLogin yes$/PermitRootLogin no/; s/^#PasswordAuthentication yes$/PasswordAuthentication no/' /etc/ssh/sshd_config
sudo service ssh restart
sudo apt-get install fail2ban
sudo apt-get install unattended-upgrades
sudo dpkg-reconfigure unattended-upgrades
sudo perl -i -pe 's!^//Unattended-Upgrade::Mail "root";$!Unattended-Upgrade::Mail "root";!' /etc/apt/apt.conf.d/50unattended-upgrades
sudo perl -i -pe 's!^APT::Periodic::AutocleanInterval "0";$!APT::Periodic::AutocleanInterval "7";!' /etc/apt/apt.conf.d/10periodic
sudo apt-get install apt-listchanges
sudo perl -i -pe 's!^which=news$!which=both!' /etc/apt/listchanges.conf
sudo ufw allow ssh
sudo ufw allow http
sudo ufw allow https
sudo ufw allow 500/udp
sudo ufw allow 4500/udp
sudo ufw allow 1701/udp
sudo ufw allow 60000:61000/udp # mosh
sudo ufw allow proto esp from any to any
sudo ufw enable
sudo apt-get install mailutils
sudo apt-get install postfix
sudo dpkg-reconfigure postfix
echo 'root: andreyvit@gmail.com' | sudo tee -a /etc/aliases
sudo newaliases
sudo service postfix restart
sudo apt-get install logwatch
sudo dpkg-reconfigure tzdata
sudo apt-get install ntp
sudo apt-get install glances