Authentication key file in MongoDB really useful to secure the database in a Replica set, there are two major things,

This post describe you how to uninstall or remove MemSQL in Linux machines. Later discuss the MemSQL installations and configuration steps.

Review Board is provided as downloadable packages through Python setup tools, it is very easy way to install and configure the Review Board,

This post describes to install and configure Nagios Client on Ubuntu system, You need to updates necessary packages, install libtool, openssl, libssl dev.

If you want to enable authentication on a replica set or a sharded cluster, members of the replica set or the sharded clusters must provide credentials to authenticate

I hope you know to install Nagios monitoring server on CentOS, this post describes to configure the Nagios client in Ubuntu machine. very simple steps to install,

After have installed ProFTPD latest version and configured in on your machine, if you may get an error while restart the ProFTPD service, proftpd Unable to Use World Readable AuthUserFile.