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XenServer 5.6: Kernel update for (paravirtualized) Ubuntu 10.04
I used jansipke’s great tutorial “Installing XenServer Tools on Ubuntu 10.04” to set up a paravirtualized Ubuntu 10.04 guest system (to enable support for the XenServer Tools) on a XenServer 5.6 host system. Using this technique, it is important to update the host system after a kernel update in the guest system. In the simplest […]
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XenServer 5.6 & Debian Lenny: Fix apt-get/aptitude GPG error
If you follow the instructions in the Citrix Developer Network to set up a (paravirtualized) Debian Lenny guest system apt-get or aptitude will show the following error W: GPG error: http://updates.vmd.citrix.com lenny Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 841D6D8DFE3F8BB2 W: You may want to run apt-get […]
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Update MooTools from 1.2.5 to 1.3: API breaks with (inbuilt) compatibility layer
Update 2010-10-20: The MooTools team decided that both API changes are not API breaks, but fixes. In detail, both functionalities I’ve used in 1.2.5 are undocumented and officially unsupported features (see Christoph Pojer’s comment and my bug report). The migration guide “Update from 1.2 to 1.3” now refers to the changes in the Request objects. […]
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Debian/Ubuntu: Basic Apache 2 security
Update 2010-10-25: I’ve added “TraceEnable Off” to the configuration (which is not the default on Debian). If you run an Apache 2 web server on a production system, it is always a good idea to make some easy configuration changes in /etc/apache2/conf.d/security to increase the server’s security: # Disable access, directory indexing and .htaccess files […]
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Debian/Ubuntu & Apache 2: Transparent reverse proxy with mod_proxy
Here is a tutorial how to use the apache module mod_proxy to set up a transparent reverse proxy that passes all requests to another web server. Under Debian or Ubuntu you have to enable the modules proxy and proxy_http: # sudo a2enmod proxy # sudo a2enmod proxy_http A use case for a transparent proxy is […]
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Ubuntu 10.04: Setup APC for PHP 5.3 and Apache2
Installing the APC (Alternative PHP Cache) using the php-apc package is straightforward: # sudo aptitude install php-apc # sudo /etc/init.d/apache2 restart Using the package php-apc installs APC 3.1.3p1. If you would like to use the most recent version 3.1.4 you can manually set up the PECL package as follows: Install the required packages: # sudo […]