Member: Wei-Jie Hsiao、Hui-Hsiung Chung
Advisor: Quicy Wu
Date: Mar.23
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Outline
Getting an Overview of cfengine
 Learning the Basic Setup

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Getting an Overview of cfengine
Cfengine is software you can use
to automate changes on UNIX (and
UNIX- like) systems.
 It is a high- level language
that describes system state, not
a general- purpose programming
language such as Perl or a shell.

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Getting an Overview of
cfengine(cont.)

Cfengine can use Several ways to
management the systems as
follows:
 Setup the network interface
 Edit the system files
 Edit the permission to access files
 Delete the unused flies
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The Components of cfengine:
 Cfagent
 Cfservd
 Cfexecd
 Cfkey
 cfrun
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cfagnet

The autonomous configuration agent
(the heart of the framework). This
command can be run manually (on
demand),cfexecd on a regular basis,
and/or by cfservd when triggered by a
remote cfrun invocation. The necessary
and sufficient condition for using
cfengine is to run cfagent somehow.
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Cfservd

The file- transfer and remote- activation
daemon. You must run this on any
cfengine file servers and on any system
where you would like to execute cfagent
remotely.
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Cfexecd

Generates public/private key pairs and
needs to be run only once on every host.
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cfkey

The execution and reporting daemon.
You run this either as a daemon or as a
regular cron job. In either case, it
handles running _b]cajp and reporting
its output.
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cfrun

You can run this command from a
remote system that will contact the
clients (through cfservd) and tell them to
execute cfagent.
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Learning the Basic Setup
Download the Cfengine from here
http://www.cfengine.org, or any other
website and install it.
 Example:

 Step1:
○ $ tar zxf cfengine-2.x.x.tar.gz
○ $ cd ./cfengine-2.x.x
○ $ ./configure
○ $ make
○ $ sudo make install
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Learning the Basic
Setup(cont.)

Then create the working directly as
follows:
 Step2:
○ # mkdir /var/cfengine
○ # mkdir /var/cfengine/bin
○ # mkdir /var/cfengine/inputs
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Learning the Basic
Setup(cont.)

Copy the binary code of cfengine to
working directly
 Step3:
○ # cp /usr/local/sbin/cfagent /var/cfengine/bin
○ # cp /usr/local/sbin/cfexecd /var/cfengine/bin
○ # cp /usr/local/sbin/cfservd /var/cfengine/bin
○ # chown -R root:0 /var/cfengine
○ # chmod -R 755 /var/cfengine
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Learning the Basic
Setup(cont.)

The first time we use the cfengine
 # /usr/local/sbin/cfkey
 # /var/cfengine/bin/cfagent
 cfengine::/bin/echo Dange: Danger, Will
Robinson!

Then we can check whether the
cfengine is successfully working or not
 #/var/cfengine/inputs/cfagent.conf
 control:
 actionsequence = ( shellcommands )
 shellcommands:
 “/bin/echo Danger, Will Robinson!”
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Thanks for listening!!
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