ZCS Quick Start Installation Guide, Open Source 6.0
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Zimbra™ Collaboration Suite Single Server Installation - Open Source : Modifying Operating System Configurations

Modifying Operating System Configurations
Configuration modifications for two of the most frequently used operating systems, Red Hat Enterprise Linux and Fedora, are described in this guide. The SUSE configuration would be similar to those described for the Red Hat Enterprise Linux. The Mac OS requires no additional modifications.
Other operating systems may require similar modifications, use this information as a reference to gauge whether your operating system may need to be modified. Also, search the Zimbra Forums and Zimbra Wiki.
Important: Zimbra recommends that the operating systems you use are updated with the latest patches that have been tested with ZCS. See the latest release notes to see the operating systems patch list that has been tested with ZCS.
Installation Modifications for Red Hat® Enterprise Linux®
The Zimbra Collaboration Suite runs on the Red Hat Enterprise Linux, version 4 operating system or later. When you install the Red Hat software for the Zimbra Collaboration Suite, except for the Disk Partition Setup, the Network Configuration, the Gateway and Primary DNS addresses, the Edit Interface, and the Firewall Configuration, accept the default setup answers. Details of what should be modified in these categories are listed below. Refer to the Red Hat Enterprise Linux installation guide for detailed documentation about installing their software.
Important:  
Disk Partitioning Setup. Check Manually partition with DiskDruid. The disk partition should be set up as follows:
The Mount Point/RAID Volume size for the Boot partition (/)should be 100 MB.
The Swap partition should be set to twice the size of the RAM on your machine.
The Root partition (/) should be set with the remaining disk space size.
 
Network Configuration>Network Devices>Hostname should be configured manually with the fully qualified hostname [mailhost.example.com] of the Zimbra server.
Enter the Gateway and Primary DNS addresses.
In the Edit Interface pop-up screen, check Activate on Boot. Enter the IP Address and Netmask of the device. This allows the interface to start when you boot.
Firewall Configuration should be set to No firewall, and the Security Enhanced Linux (SELinux) should be disabled.
Important: You will need to disable Sendmail in order to run the Zimbra Collaboration Suite. You can disable the Sendmail service with these commands: chkconfig sendmail off, service sendmail stop.
Important: Make sure that FQDN entry in /etc/hosts appears before the hostnames. If this is missing, the creation of the Zimbra certificate fails. The FQDN entry should look like this example. See zmcreatecert in the Administrator’s Guide, Appendix A: Command-Line Utilities.
 
127.0.0.1           localhost.localdomain localhost
your.ip.address         FQDN yourhostname
Installation Modifications for Fedora™
The Zimbra Collaboration Suite runs on the Fedora, Core 4 operating system. When you install the Fedora software for the Zimbra Collaboration Suite, except for the Disk Partition Setup, the Network Configuration, the Gateway and Primary DNS addresses, the Edit Interface, and the Firewall Configuration, accept the default setup answers. Details of what should be modified in these categories are listed below. Refer to the Fedora installation guide for detailed documentation about installing their software.
Disk Partitioning Setup. Check Manually partition with DiskDruid. The disk partition should be set up as follows:
The Mount Point/RAID Volume size for the Boot partition (/) should be 100 MB.
The Swap partition should be set to twice the size of the RAM on your machine.
The Root partition (/) should be set with the remaining disk space size.
Network Configuration>Network Devices>Hostname should be configured manually with the hostname name [mailhost.example.com] of the Zimbra server.
Enter the Gateway and Primary DNS addresses.
In the Edit Interface pop-up screen, check Activate on Boot. Enter the IP Address and Netmask of the device. This allows the interface to start when you boot.
Firewall Configuration should be set to No firewall, and the Security Enhanced Linux (SELinux) should be disabled.
Important: The following should also be considered before you install the Zimbra Collaboration Suite:
You must disable Sendmail in order to run the Zimbra Collaboration Suite application. The Sendmail command to stop the service is /etc/init.d/sendmail stop. To disable, enter chkconfig sendmail off. The Postfix command to stop the service is /etc/init.d/postfix stop. To disable, enter chkconfig postfix stop.
Make sure that FQDN entry in /etc/hosts appears before the hostnames. If this is missing, the creation of the Zimbra certificate fails. The FQDN entry should look like this example.
 
127.0.0.1           localhost.localdomain localhost
your.ip.address         FQDN yourhostname
Installation Modifications for Mac OS® Servers
Note: Mac OS X 10.4.x. is supported in ZCS 6.0.x, but Mac OS X 10.5 and Mac OS X 10.6 are not supported.
 
No modifications are required for Mac OS servers, but Java 1.5 must be set as the default Java.
To set Java 1.5 as the default, follow these steps:
1.
2.
3.
4.

Zimbra™ Collaboration Suite Single Server Installation - Open Source : Modifying Operating System Configurations

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ZCS Quick Start Installation Guide, Open Source 6.0
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