These instructions apply only to ServletExec 4.1.1 or 4.2 with ArcIMS 4.0.1, using a version of the Apache web server that is supported by ArcIMS 4.0.1. on a supported Unix operating system.
Note: In order to understand which versions of Apache are supported on which brands/versions of Unix (Linux, Solaris, HP-UX, etc...) you should access the ArcIMS 4.0.1 System Requirements area of the ESRI website.

Instructions for integrating other versions of ServletExec and ArcIMS can be found here.

The instructions at this website are provided by New Atlanta Communications.
At the time of this writing, ESRI does not provide its own steps for installation and configuration of ServletExec and ArcIMS on a Unix platform.
However, in the event that they add such steps later,
A listing of all such ESRI knowledge base articles can be found here.

 

Note: If you ran the ArcIMS 4.0.1 Post Installer, it should have already created the neccessary virtual directories in your Apache webserver automatically (by updating httpd.conf). In which case, you won't need to create them manually, and can simply skip this step.

After installing ArcIMS, you must create virtual directories for Manager, output, and website. A virtual directory is a mapped location on the Web server to a physical path on the hard drive.
Note: If you browsed to the location of your Web server root directory to create directories for output and website (the Web Site Working Directories) during ArcIMS installation, you don't need to create virtual directories for output and website (you can skip this step).

a. Stop the Apache Web Server.

b. Make a copy of Apache's configuration file (httpd.conf) and name the copy:
httpd.conf.before_ArcIMS

c. Open
<Apache Installation Directory>/conf/httpd.conf

In the Alias section, add the following for website and server output:

Alias /output "/<Path to output directory>/output"
<Directory "/<Path to output directory>/output">
Options Indexes MultiViews
AllowOverride None
Order allow,deny
Allow from all
</Directory>
Alias /website "/<Path to website directory>/website"
<Directory "/<Path to website directory>/website">
Options Indexes MultiViews
AllowOverride None
Order allow,deny
Allow from all
</Directory> 
 

d. In order for the Web pages designed in ArcIMS to start automatically, make sure your DirectoryIndex line includes default.htm. For example:
DirectoryIndex index.html default.htm

e. Save and close the httpd.conf file.

f. Start the Apache Web Server.

See "Step 5: Configure ArcIMS" in the ArcIMS 4.0 Installation Guide for the final step required to get ArcIMS running.