Submitted by Mathew Branwell on Wed, 04/04/2012 - 20:27
If your system was not configured with administrator e-mail then on 500 Internal Server Error you will see the following message:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, [no address given] and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
To set admin's e-mail open:
Submitted by Mathew Branwell on Wed, 04/04/2012 - 18:32
This guide is based on various community forum posts. Special thanks to Jonathan Wagener for the Ubuntu specific instructions
Submitted by Mathew Branwell on Wed, 04/04/2012 - 04:10
Despite it is clearly noted on http://drupal.org/node/1248790 the recommended way is to download Drush from the project page and to install it manually by reading the instructions of the README.txt file, many people start executing the aptitude command given on the same page:
$ sudo apt-get install drush
and the subsequent commands like
$ drush --version
$ drush dl drush
give you no joy since the official Ubuntu repositories contain very much outdated version of drush, which can not neither update itself nor display its version.
Submitted by Mathew Branwell on Mon, 04/02/2012 - 00:15
Munin is a networked resource monitoring tool that can help analyze resource trends and “what just happened to kill our performance?” problems. It is designed to be very plug and play. A default installation provides a lot of graphs with almost no work.
Install
To start this tutorial you will need a web server, both Lighttpd and Apache will do the job. For this tutorial I will use Lighttpd which is available from the Ubuntu Repositories.
sudo aptitude install lighttpd
You will also need PHP installed on the system.
Submitted by Mathew Branwell on Sat, 03/31/2012 - 16:29
This guide will show you how to properly install APF firewall, one of the better known Linux firewalls available, on different Linux distros like Redhut/CentOS and Debian/Ubuntu. Configuration part doesn't differ from distro to another distro, so reading the official README file or googling will suffice.
Submitted by Mathew Branwell on Sat, 03/31/2012 - 16:00
The sysv-rc-conf program gives an easy to use interface for managing "/etc/rc{runlevel}.d/" symlinks. The interface comes in two different flavors, one that simply allows turning services on or off and another that allows for more fine tuned management of the symlinks.
Unlike most programs configuration of the levels, you can edit startup scripts for any runlevel, not just the current.
To install just need to run the command:
sudo apt-get install sysv-rc-conf
Once installed run the command:
sudo sysv-rc-conf
Submitted by Mathew Branwell on Tue, 03/20/2012 - 21:47
There are several ways to list installed packages in Ubuntu, like:
sudo dpkg-query -Wf '${Installed-Size} - ${Package}n \n' | sort -n
sudo aptitude search '?installed'
In CentOS run one of these commands:
yum list installed
On any Linux machine with rpm installed:
You need to use rpm command to display all installed packages in Linux.
Red Hat/Fedora Core/CentOS Linux
Type the following command to get list of all installed software
# rpm -qa | less
Submitted by Mathew Branwell on Mon, 03/19/2012 - 22:13
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