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+<http://www.iredmail.org/wiki/index.php?title=IRedMail/FAQ/Unattended.iRedMail.Installation>
+
+#How to perform silent/unattended iRedMail installation
+
+* iRedMail will store configrations in file iRedMail-x.y.z/config during installation, and ask you whether to use it for installation directly or re-create one.
+* iRedMail will read several global variables for automate installation.
+
+You can create a sample config file by executing iRedMail installer:
+<pre>
+# bash iRedMail.sh
+</pre>
+After config wizard dialogs, you will find file "config" under iRedMail root directory. For example, __/root/iRedMail-0.8.7/config__. it will ask whether to start installation or not, you can cancel it if you want.
+
+You can copy this config file to deploy as many servers as you want, change the hard-coded passwords in it if you want.
+
+How to deploy a new server with sample config file:
+
+* Copy sample config file to new server, e.g. /root/iRedMail-0.8.7/config.
+* Execute iRedMail installer with shell variables:
+<pre>
+# AUTO_USE_EXISTING_CONFIG_FILE=y \
+    AUTO_INSTALL_WITHOUT_CONFIRM=y \
+    AUTO_CLEANUP_REMOVE_SENDMAIL=y \
+    AUTO_CLEANUP_REMOVE_MOD_PYTHON=y \
+    AUTO_CLEANUP_REPLACE_FIREWALL_RULES=y \
+    AUTO_CLEANUP_RESTART_IPTABLES=y \
+    AUTO_CLEANUP_REPLACE_MYSQL_CONFIG=y \
+    AUTO_CLEANUP_RESTART_POSTFIX=n \
+    bash iRedMail.sh
+</pre>
+
+
+--------
+
+
+Here's how i preform iRedMail tests every day with VMware Fusion on Mac OS X, all are completed with a shell script and VMware command line tool "vmrun" and "scp", "ssh". Hope it helps.
+
+* Install a clean, basic/minimal OS (Debian/CentOS/openSUSE/OpenBSD/etc), set proper hostname, configure network, then shut down this server and create a VMware snapshot named "Latest". The snapshot name will be used in my shell script, it needs a snapshot name to reverse VM to the clean OS.
+* Revert VM to the latest snapshot (a clean, basic, minimal OS) with "vmrun".
+* Start this VM with "vmrun", sleep 30 (or 60) seconds waiting for OS start up.
+* Detect network connection to this VM, if it's up, upload required files with "scp":
+ * the latest development edition of iRedMail
+ * source tarballs required by iRedMail (Roundcube, iRedAdmin, iRedAPD, etc)
+ * downloaded RHEL/CentOS/Debian/Ubuntu/OpenBSD binary packages, FreeBSD distfiles etc. The most important one is a prepared iRedMail config file: iRedMail-x.y.z/config.
+* Create/Update iRedMail installation status file: iRedMail-x.y.z/.status to skip downloading source tarballs, etc.
+* Perform installation via ssh like this:
+<pre>
+ssh root@[SERVER] "cd /root/iRedMail/ && IREDMAIL_DEBUG='NO' AUTO_USE_EXISTING_CONFIG_FILE=y AUTO_INSTALL_WITHOUT_CONFIRM=y AUTO_CLEANUP_REMOVE_SENDMAIL=y AUTO_CLEANUP_REMOVE_MOD_PYTHON=y AUTO_CLEANUP_REPLACE_FIREWALL_RULES=y AUTO_CLEANUP_RESTART_IPTABLES=y AUTO_CLEANUP_REPLACE_MYSQL_CONFIG=y AUTO_CLEANUP_RESTART_POSTFIX=n bash iRedMail.sh"
+</pre>
+* Perform after-installation tasks: upload downloaded ClamAV database, ..., reboot server.
+
+It should be finished in 2-3 minutes (uploading binary packages takes most time), then i got a working iRedMail server. I do this many times each day.
+
+I have 5 prepared iRedMail config files for different backends: OpenLDAP, MySQL, MariaDB, PostgreSQL, ldapd (OpenBSD only). i run my script with an option to install iRedMail with specified backend like below, the script will upload proper config file to server:
+<pre>
+# bash auto.centos7.sh ldap
+# bash auto.centos7.sh mysql
+# bash auto.centos7.sh pgsql
+# bash auto.ubuntu14.sh mariadb
+# bash auto.openbsd55.sh ldapd
+</pre>
+
+Below is file of __auto.centos7.sh__ mentioned above, it prepares VMware virtual machine, then execute another script __c7.sh__ to perform the real installation.
+<pre>
+#!/usr/bin/env bash
+# File: auto.centos7.sh
+
+[ X"$#" != X'1' ] && echo 'No backend? ldap, mysql, pgsql' && exit 255
+export backend="${1}"
+
+export VMRUN='vmrun -T fusion'
+export VM_USER_ROOT='root'
+export VM_HOSTNAME='c7'
+
+export VM="/Users/zhb/vm.packages/vm/CentOS-7-x86_64.vmwarevm/CentOS-7-x86_64.vmx"
+
+echo "* Revert to the latest snapshot."
+${VMRUN} revertToSnapshot ${VM} Latest
+
+echo "* Start VM."
+${VMRUN} start ${VM}
+
+echo "* Sleep 30 seconds to wait VM start up."
+sleep 30
+
+echo "* Detect network status with ssh."
+while :; do
+    ssh ${VM_USER_ROOT}@${VM_HOSTNAME} "exit"
+    if [ X"$?" == X'0' ]; then
+        break
+    else
+        sleep 5
+    fi
+done
+
+echo "* Start testing iRedMail."
+sh ${VM_HOSTNAME}.sh ${backend}
+</pre>
+
+<pre>
+#!/usr/bin/env bash
+# File: c7.sh
+[ X"$#" != X'1' ] && echo 'No backend?' && exit 255
+backend="${1}"
+# hostname of your VMware virtual machine set in Mac OS X /etc/hosts.
+HOST="c7"
+
+echo 'copying iRedMail ...'
+scp -r ~/projects/iredmail/iRedMail root@${HOST}:~ >/dev/null
+
+echo 'copying pkgs/misc ...'
+scp -r misc root@${HOST}:~/iRedMail/pkgs/ >/dev/null
+scp -r config.${backend} root@${HOST}:~/iRedMail/config >/dev/null
+
+echo 'copying archives ...'
+scp -r rhel/7/yum root@${HOST}:/var/cache/ >/dev/null
+
+echo 'updating .status ...'
+ssh root@${HOST} "echo export status_check_new_iredmail='DONE' > /root/iRedMail/.status"
+ssh root@${HOST} "echo export status_fetch_pkgs='DONE' >> /root/iRedMail/.status"
+ssh root@${HOST} "echo export status_fetch_misc='DONE' >> /root/iRedMail/.status"
+ssh root@${HOST} "echo export status_cleanup_update_clamav_signatures='DONE' >> /root/iRedMail/.status"
+ssh root@${HOST} "cd /root/iRedMail/ && yum clean metadata && AUTO_USE_EXISTING_CONFIG_FILE=y AUTO_INSTALL_WITHOUT_CONFIRM=y AUTO_CLEANUP_REMOVE_SENDMAIL=y AUTO_CLEANUP_REMOVE_MOD_PYTHON=y AUTO_CLEANUP_REPLACE_FIREWALL_RULES=y AUTO_CLEANUP_RESTART_IPTABLES=y AUTO_CLEANUP_REPLACE_MYSQL_CONFIG=y AUTO_CLEANUP_RESTART_POSTFIX=n bash iRedMail.sh"
+ssh root@${HOST} "/usr/bin/systemctl stop firewalld"
+
+#ssh root@${HOST} "mkdir /root/pro && cp /var/www/iredadmin/settings.py /root/pro/"
+#scp -r clamav/* root@${HOST}:/var/lib/clamav/
+#ssh root@${HOST} "chown clamupdate:clamupdate /var/lib/clamav/*"
+ssh root@${HOST} "echo 'reboot'; reboot"
+</pre>