Default CentOS 7 configuration

#Install default packages
$ yum update
#install the  Fedora Extra Packages for Enterprise Linux (EPEL) repository
#http://www.rackspace.com/knowledge_center/article/install-epel-and-additional-repositories-on-centos-and-red-hat
$ yum install epel-release
$ yum install docker
$ yum install collectd
$ yum install mailx

#Create sysop users
$ useradd sanmai
$ usermod -aG wheel sanmai
$ useradd dietuyt
$ usermod -aG wheel dietuyt
$ useradd wilelb
$ usermod -aG wheel wilelb
#Set passwords for the users: passwd <user>

#Configure sshd
#no root login
PermitRootLogin no
#no username/password login
PasswordAuthentication no

#forward mail from root to sysops@clarin.eu
$ echo "root: sysops@clarin.eu" >> /etc/aliases
$ newaliases
$ service postfix restart

#test the configuration
$ echo test | mail -s "test message" root

#Enable services
systemctl enable docker.service

Auto start service on boot

systemctl enable httpd.service