How to Fix “cannot restore segment prot after reloc: Permission denied” error While Restarting zmcontrol on Zimbra

In web server administration, encountering errors is a common occurrence. One such error that Zimbra users often face is the “cannot restore segment prot after reloc: Permission denied” error. This error typically arises when you attempt to start Zimbra services using the “zmcontrol start” command.

This comprehensive guide will walk you through the steps to resolve this issue, ensuring your Zimbra services run smoothly. For a deeper understanding of web servers, you may want to explore our guide on the best web servers.

Understanding the Error

When you attempt to start Zimbra services using the “zmcontrol start” command, you might encounter the following error messages:

[zimbra@mail ~]$ zmcontrol start
Host mail.bloggerbaru.local
 Starting zmconfigd...Done.
 Starting logger...Done.
 Starting mailbox...Done.
 Starting antispam...Done.
 Starting antivirus...Done.
 Starting snmp...Done.
 Starting spell...Failed.
Starting apache...httpd: Syntax error on line 232 of /opt/zimbra/conf/httpd.conf: Cannot load /opt/zimbra/httpd/modules/libphp5.so into server: /opt/zimbra/httpd/modules/libphp5.so: cannot restore segment prot after reloc: Permission denied
failed.

This error is typically caused by SELinux, which prevents Zimbra services from starting. To resolve this issue, you need to disable SELinux.

Disabling SELinux

To disable SELinux on your next reboot, you need to modify the SELinux configuration file. Here’s how you can do it:

[root@centos6 ~]# vi /etc/selinux/config
# 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 - Only targeted network daemons are protected.
# strict - Full SELinux protection.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
# SETLOCALDEFS= Check local definition changes
SETLOCALDEFS=0

To disable SELinux without having to reboot, you can use the setenforce command as follows:

[root@mail ~]# setenforce 0

Restarting Zimbra Services

After disabling SELinux, you can rerun the “zmcontrol start” command to start Zimbra services:

[zimbra@mail ~]$ zmcontrol start
Host mail.bloggerbaru.local
 Starting zmconfigd...Done.
 Starting logger...Done.
 Starting mailbox...Done.
 Starting antispam...Done.
 Starting antivirus...Done.
 Starting snmp...Done.
 Starting spell...Done.
 Starting mta...Done.
 Starting stats...Done.

At this point, your Zimbra services should start without any issues.

Commands Mentioned

• zmcontrol start – This command is used to start Zimbra services.
• vi /etc/selinux/config – This command opens the SELinux configuration file for editing.
• setenforce 0 – This command disables SELinux without requiring a system reboot.

Conclusion

In conclusion, the “cannot restore segment prot after reloc: Permission denied” error in Zimbra is typically caused by SELinux, and can be resolved by disabling SELinux. This guide has walked you through the steps to identify and resolve this issue, enabling youto run your Zimbra services without any hiccups. Remember, while disabling SELinux can resolve this issue, it’s important to understand the potential security implications and ensure you have other security measures in place.

For more in-depth information about web servers and their configurations, feel free to explore our guides on Apache, Nginx, and LiteSpeed. If you’re considering different hosting options, our articles on dedicated server, VPS server, cloud hosting, and shared hosting can provide valuable insights.

Remember, the key to effective web server administration is understanding the underlying systems and being able to troubleshoot issues as they arise. With the right knowledge and resources, you can ensure your web services run smoothly and efficiently.

FAQ

1. What causes the “cannot restore segment prot after reloc: Permission denied” error in Zimbra?

   This error is typically caused by SELinux, a Linux kernel security module that provides a mechanism for supporting access control security policies. If SELinux is enabled, it may prevent Zimbra services from starting, leading to this error.

2. How can I disable SELinux?

   You can disable SELinux by editing the SELinux configuration file (/etc/selinux/config) and setting SELINUX=disabled. Alternatively, you can use the setenforce command with the argument 0 to disable SELinux without having to reboot your system.

3. What is the “zmcontrol start” command used for?

   The “zmcontrol start” command is used to start Zimbra services. If you encounter any errors while starting Zimbra services, the output of this command can help you identify the cause of the issue.

4. What should I do if I still encounter the error after disabling SELinux?

   If you still encounter the “cannot restore segment prot after reloc: Permission denied” error after disabling SELinux, it’s recommended to check the Zimbra logs for any additional error messages that might help you identify the cause of the issue. You may also want to verify that all necessary Zimbra components are installed and configured correctly.

5. Is it safe to disable SELinux?

   Disabling SELinux can make your system more vulnerable to security threats, as SELinux provides a mechanism for supporting access control security policies. However, in some cases, such as when it’s causing issues with certain services like Zimbra, it may be necessary to disable it. It’s recommended to only disable SELinux if you understand the potential risks and have other security measures in place.