##UPDATE FIRST[root@centos7 ~]# yum update -y

##SET HOSTNAME[root@centos7 ~]# hostnamectl status[root@centos7 ~]# hostnamectl set-hostname domain.tld

##DISABLE SELINUX[root@centos7 ~]# vim /etc/sysconfig/selinux

Change enforcing to disabled :

# This file controls the state of SELinux on the system.# SELINUX= can take one of these three values:# enforcing - SELinux security policy is enforced.# permissive - SELinux prints warnings instead of enforcing.# disabled - No SELinux policy is loaded.SELINUX=disabled# SELINUXTYPE= can take one of these two values:# targeted - Targeted processes are protected,# minimum - Modification of targeted policy. Only selected processes are protected.# mls - Multi Level Security protection.SELINUXTYPE=targeted

##STOP MTA[root@centos7 ~]# systemctl stop postfix[root@centos7 ~]# systemctl disable postfix[root@centos7 ~]# systemctl stop sendmail[root@centos7 ~]# systemctl disable sendmail

##DISABLE FIREWALL

[root@centos7 ~]# systemctl stop firewalld[root@centos7 ~]# systemctl mask firewalld

##INSTALL LIBRARIES[root@centos7 ~]# yum install perl perl-core ntpl nmap sudo libidn gmp libaio libstdc++ unzip sysstat sqlite -y

##DOWNLOAD ,EXTRACT AND INSTALL ZIMBRA

[root@centos7 ~]# wget https://files.zimbra.com/downloads/8.6.0_GA/zcs-8.6.0_GA_1153.RHEL7_64.20141215151110.tgz

[root@centos7 ~]# tar xzf zcs-8.6.0_GA_1153.RHEL7_64.20141215151110.tgz[root@centos7 ~]# cd zcs-8.6.0_GA_1153.RHEL7_64.20141215151110[root@centos7 ~]# ./install.sh --platform-override=========================================DONE================================

INSTALL WEBMIN :

#DOWNLOAD INSTALLER[root@centos7 ~]# wget [url file webmin][root@centos7 ~]# rpm –uvn webminxxxx

================================DONE========================================