Category Archives: Computing

This category is about computer science topics.

Alfresco JSF

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The implementation of JSF used in Alfresco is MyFaces, and as such, it is incompatible with some J2EE application servers which come with some other implementation.

In JBoss, depending on the AS version, some actions must be done to disable the standard implementation.  These actions are described in the JBoss Wiki, follow this URL: http://wiki.jboss.org/wiki/Wiki.jsp?page=Running2.6WithJBossAS4.2.xAndMyFaces

The easiest is to use the bundled version of alfresco with Tomcat, change its ports to avoid clashes with other instances of Tomcat or other servers and attach it to an Apache httpd server with the Tomcat connector.

OpenOffice.org Fedora / CentOS

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After having installed the OpenOffice.org RPMs from the http://www.openoffice.org/ site on Fedora or CentOS, no application starts in graphical mode because the SELinux security context is not set correctly.

To correct this, execute, as root, in the “program” directory of your openoffice installation, the following command:
# chcon -t textrel_shlib_t libvclplug_gen680li.so.1.1

Or simply set SELinux to permissive.

The error message that is displayed generally is:

no suitable windowing system found, exiting

Create a SVN repository

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I just created a new SVN repository on my private server.

Basically, the only command to call is svnadmin create /srv/svnrepo, if we assume that the repository will be located in /srv/svnrepo.

But there are some issues: a normal user generally does not have write access to this folder.

For this purpose, we create a svnusers group, which contains all users that are allowed to use SVN. Then we chown the repository directory so that svnusers is the group owning the directory and we chmod the directory to writable for the group’s users.

Basically that’s all. Now we have a running SVN repository.

Further tasks may be to access the SVN repository through SSH or HTTP.