Error: Could not open command file ‘/usr/local/nagios/var/rw/nagios.cmd’ for update!

Error: Could not open command file ‘/usr/local/nagios/var/rw/nagios.cmd’ for update!,An error that comes up from time to time and is quite annoying to deal with, I found a way to fix the problem, it is not the best way, but it is simple and fast.

Apache : James - Generating Users list

We have gone through about James server in previous post. In this post, we'll see how to generate user list from James Server.
James server provides a very good utility to check the users list on the server. Either we can see the user list on the console or we can redirect the userlist in any text file.  This article contains the steps to generate the user list from James server:

Apache: James Server

The Apache Java Mail Server Version 3.0 is a 100% pure Java SMTP, IMAP4 and POP3 Mail server designed to be a complete and portable enterprise mail engine solution. Apache James Server is based on currently available open protocols. 
Advantages
a. Standard

• 100% pure Java Mail server designed to be a complete and portable enterprise mail engine solution.
• Supports currently available IETF protocols, including SMTP, LMTP, POP3 and IMAP4.
• Apache James Server is able to store user and message data either in a file-system (Maildir), any JPA-compatible database and even JCR, allowing fast, reliable, even real-time replicated storage.
• Provides a powerful, flexible mail application engine through support for the Apache Mailet API. With its Mailet pipeline architecture, Apache James Server can be used not only to provide standard e-mail services, but also to implement custom e-mail applications.