This post explains how to install a global RVM (Ruby Version Manager) with Passenger 3 gem, Ruby Enterprise Edition in a Debian server machine for all users.

You probably see this error when you are trying to start apache with /etc/init.d/apache2 start and there is no effect. This error is caused by not clearing semaphores by apache and/or mod_fcgid and/or mod_passenger. You can see the list of semaphores with the command ipcs -s.

This is a hint for all those who are happy users of IA-64 and Ubuntu 8.04 (hardy) and would like to upgrade to 9.04 (karmic). The upgrade process is as simple as editing /etc/apt/sources.list,  changing hardy to karmic and doing apt-get dist-upgrade. After that however, you will experience a blank screen with flashing cursor after [...]

Quite common usage scenario is a Postfix mail server with a Mailman instance for groups. Even more often the accounts for the mail are stored in an LDAP tree. And in this case a problem appears, because Mailman doesn’t have a native connection to LDAP. That’s why I needed to have an LDAP 2 Mailman [...]