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If you are using RedHat Enterprise Linux, CentOS or Amazon Linux, stop right there! We now have RPM packages for CentOS and RedHat 5.x/6.x, and Amazon Linux. Read the following instructions instead of this document.

Guess what? If you are using Debian or Ubuntu, packages are also available for your platform (although not yet for Xenial)!

Install Sun Java JDK

1. You should install a Sun/Oracle Java SDK. Use Oracle's installation instructions. Choose the appropriate 32-bit or 64-bit Linux installer, for example jdk-6u27-linux-x64-rpm.bin, and install it.


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ln -s /usr/java/jdk1.6.0_27 /usr/java/jdk1.6
ln -s /usr/java/jdk1.6/bin/java /usr/bin/java

and you need to change your path in your bash profile (_~/.bash_profile) to have this path :

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Optional: Install the WebObjects frameworks


If you embed the frameworks into your applications, you don't need to install the core frameworks on the deployment system. Install them only if your applications don't have the frameworks inside their bundles.


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curl -C - -O



and install it like this :


sudo java -jar WOInstaller.jar dev54 /opt

You may see an error as the command above finishes, but WO may still be installed.

This command below is what you could do if you did not need the dmg above. Unfortunately there is a bug having to do with downloading via HTTPS and you do not get the WebObjects543.dmg automatically and you need the command above.

    sudo /usr/java/latest/bin/java -jar WOInstaller.jar 5.4.3 /opt


WebObjects frameworks are now installed in /opt

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[root@ ~]# ls -l /opt
total 12
drwxr-xr-x 3 root root 4096 Nov  9 08:19 Developer
drwxr-xr-x 4 root root 4096 Nov  9 08:19 Library
drwxr-xr-x 3 root root 4096 Nov  9 08:20 Local

Creating the appserver user and starting wotaskd/JavaMonitor

To follow the conventions from Mac OS X, we will create two users to run wotaskd and Monitor under this user :

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sudo groupadd appserveradm
sudo useradd -g appserveradm appserver

Edit the bash profile of the appserver

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#sudo# sudo su - appserver
% vi .bash_profile

and add this line :

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export NEXT_ROOT=/opt

and run it manually in your current shell :

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[appserver@ ~]$ . .bash_profile

3. Next, we need to install the Wonder version wotaskd and JavaMonitor.

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$ mkdir -p /opt/Local/Library/WebObjects/JavaApplications
$ cd /opt/Local/Library/WebObjects/JavaApplications

$ wget
$ tar zpxf wotaskd.tar.gz
$ rm wotaskd.tar.gz
$ wget
$ tar zpxf JavaMonitor.tar.gz
$ rm JavaMonitor.tar.gz

4. Now we need to change some permissions:

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sudo chown -R appserver:appserveradm /opt/Local
sudo chown -R appserver:appserveradm /opt/Library

5. Now we can start wotask and Monitor

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[root@ ~]# sudo su - appserver

You can start wotaskd and Monitor to make sure that they run without any problems :

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[appserver@ ~]$ $NEXT_ROOT/Local/Library/WebObjects/JavaApplications/wotaskd.woa/wotaskd &
[appserver@ ~]$ $NEXT_ROOT/Local/Library/WebObjects/JavaApplications/JavaMonitor.woa/JavaMonitor -WOPort 56789 &


If your Linux installation don't already have Apache httpd running or installed, you need to install it:

For Ubuntu distributions :

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sudo apt-get install apache2 apache2.2-common apache2-mpm-prefork apache2-utils apache2-threaded-dev ssl-cert

On that system the relevant command names are apache2ctl and apxs2, and the document root is /var/www (not /usr/local/apache/htdocs as in the example below).

(you will need httpd-devel and gcc)

For CentOS, RedHat or Fedora distributions :

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I found on AWS for apache 2.4 I had to change the yum to:
 yum install httpd24 httpd24-devel
 yum install httpd mod_ssl httpd-devel
 chkconfig httpd on
 /etc/init.d/httpd start

.. default install location is then /etc/httpd

HTTP Adaptor

First, check if a pre-built module already exists at If you are running CentOS 6.x, you can use the module for CentOS 5.5, it works fine.


If you can't find a adaptor for your Linux platform, you will have to build it

Apache Configuration

Instead of copying the WebObjects directory, you can use a alias to point to the folder inside NEXT_ROOT. In your Apache configuration, add something like :

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Alias /WebObjects "/opt/Local/Library/WebServer/Documents/WebObjects"

and add a directive to allow fetching files in this directory:

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<Directory "/opt/Local/Library/WebServer/Documents/WebObjects">
      AllowOverride All
      Order allow,deny
      Allow from all

Or (depending on your Apache configuration) you could use a symbolic link.


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<LocationMatch /apps/WebObjects/.*>
    Order allow,deny
    Allow from all

If you don't add it, you will get 403s (Forbidden) HTTP errors.


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Include conf/extra/webobjects.conf

Check for any errors with apachectl configtest, and if everything's ok, you are good to go. You can install your first app, don't forget that your app must be accessible by the appserver user or the appserveradm group. If your app don't start or if Monitor complains about a path, it might be a permission problem.


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/usr/local/apache/bin/apachectl -M

On my installation on OpenSuse 11.1, I had to change the path to the lib64 directory where Apache contains the modules.

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LoadModule WebObjects_module /usr/lib64/apache2/

Auto Start WOTaskd and WOMonitor

One last thing, you need a init script to start wotaskd and Monitor at boot time.

Systems using upstart (Ubuntu and maybe others)

If you are running Ubuntu that have support for upstart, you can grab the two startup scripts for upstart on GitHub. Grab the two files (womonitor.conf and wotaskd.conf) and copy them in /etc/init/. Once they are in this directory, run:



Don't forget to change the permissions on the startup file so that the owner is root and that everyone have execution rights!

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chown root /etc/init/wotaskd.conf
chown root /etc/init/womonitor.conf
chmod 755 /etc/init/wotaskd.conf
chmod 755 /etc/init/womonitor.conf

Systems not using upstart (CentOS, RedHat, Fedora and others)

If you are running a system not capable of running upstart, like CentOS, RedHat or older versions of Ubuntu, you need to use the old-style init.d startup script. Again, the scripts are available on GitHub. Grab the two files (womonitor and wotaskd) and copy them in /etc/init.d/.



Don't forget to change the permissions on the startup file so that the owner is root and that everyone have execution rights!

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chown root /etc/init.d/wotaskd
chown root /etc/init.d/womonitor
chmod 755 /etc/init.d/wotaskd
chmod 755 /etc/init.d/womonitor

Systems using systemd instead of upstart (like Ubuntu 16.04 LTS)


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# systemd unit for wotaskd to run on Ubuntu 16.04 LTS 
# Maik Musall <>, Aug 2016
Description=WebObjects/Wonder wotaskd
Environment="JVM_OPTIONS=-Xms32m -Xmx64m -XX:NewSize=2m"
ExecStart=/opt/Local/Library/WebObjects/JavaApplications/wotaskd.woa/wotaskd -WOPort 1085 -Xms32m -Xmx64m >> $WOTASKD_LOG 2>&1


Start it at runtime by doing systemctl enable wotaskd.service

Problems with Application Responding to WOMonitor/WOTaskd

If your Linux server is a virtual machine or if it has multiple IP addresses, you may find that clicking 'Stop' in WOMonitor has no effect on instances, or that the applications never start (the level just go up and down non-stop). This can usually be solved for all Wonder-based applications running on hosts with such a problem by simply creating the following file (known as the 'Machine Properties' file in Wonder's ERXProperties):

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And inside that file, add an array property that defines all the IP addresses assigned to your host, for example:

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To learn more, see the class named WOHostUtilities in ERExtensions framework


If SELinux is enabled on your system, wotaskd won't be reachable due to its preventing Apache from opening TCP connections. If you're comfortable with allowing Apache to connect to any TCP ports (including external hosts), you can run the following:

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sudo setsebool -P httpd_can_network_connect=1

Alternatively, Steven Klassen has written a blog post (Custom SELinux Port Access) that outlines how to create and install a wotaskd SELinux module that specifically allows connections to port 1085.


Be aware that SELinux is enabled by default on CentOS 6.x, you will need to either call the setsebool command or to disable SELinux

Additional Resources

Jonathon Rentzsch WOPlat Project 'WOInstaller + Wonder Web Server Adaptor + OS Support Files'