Default CentOS 7 configuration

#Install default packages
$ yum update
$ 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

##Sudo configuration (visudo)
#Host_Alias       LOCAL=localhost,lvps92-51-161-129.dedicated.hosteurope.de
User_Alias     ADMINS = sanmai,wilelb,dietuyt
## Administrators
ADMINS  ALL=(ALL) /bin/su

Auto start service on boot

systemctl enable httpd.service