Book Image

CentOS System Administration Essentials

Book Image

CentOS System Administration Essentials

Overview of this book

Table of Contents (18 chapters)
CentOS System Administration Essentials
About the Author
About the Reviewers

Installing 389-ds

In the following sections, we will see the steps involved in installing 389-ds.

Configuring DNS or hostname records

When installing OpenLDAP or 389-DS, it is imperative that you can resolve the hostname of the system on which you install the directory. My system is named, and I have a local DNS record for this but it can also be maintained by an entry in the local /etc/hosts file on the host system. I can verify the name is correct by using the host command or something similar:

$ host

You should see the IP address being returned. You can see the result of this command when executed on my system in the following screenshot:

Setting TCP keepalives

The default timeout of TCP connections is 120 minutes. We will configure it for five minutes. In doing so, we will reduce the overhead caused by dropped TCP connections; they will be closed much more quickly. Edit the /etc/sysctl file to include the following line:

net.ipv4.tcp_keepalive_time = 300

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