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KDE 4.0 is the innovative Free Software desktop containing lots of applications for every day use as well as for specific purposes.Plasma is a new desktop shell developed for KDE 4, providing an intuitive interface to interact with the desktop and applications.The Konqueror web browser integrates the web with the desktop. The Dolphin file manager, the Okular document reader and the System Settings control center complete the basic desktop set.

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Since Drupal has been coming out with rapid updates, mainly due to security fixes, it's quite cumbersome to have to keep it up to date. However, with the below setup and the script to help with the maintenance, it was a breeze with the last update. The script has been used to upgrade from 5.5 to 5.6 release.

Note: The script does not currently have any checks (extreme alpha stage) and my Drupal installation is not a standard install so usage may vary. Make sure you understand the script prior to running it. Usual disclaimer applies. You will also need root level access to shell to run the script as it is set to change ownership of files and folders using the "chown" command.

My current Drupal install are based on symbolic links for easy maintenance and upgrades. The layout is as below:

/var/www/html, /var/www/html/site_files, /var/www/html/sites are all symbolically linked to the /var/www/drupal-5.x, /var/www/drupal_files, /var/www/drupal_sites respectively where /var/www/html is the web root.

Document Root = /var/www/html            -> /var/www/drupal-5.x
Files Folder  = /var/www/html/site_files -> /var/www/drupal_files
Sites Folder  = /var/www/html/sites      -> /var/www/drupal_sites

Also, any customization to the .htaccess is on top of the default Drupal code. So the script will automatically prepend the data to the upgraded .htaccess file. Since, I also have the gallery module, the .htaccess file is also set to be writable by apache.

Don't forget to set your site in "maintenance mode" with the default theme, and disable all modules prior to the upgrade. Although, I've done some updates with all modules available without any issues. Also, my custom theme resides in the sites folder and stays untouched with the update.

Place the script in "/var/www" (just outside your document root) and run the update via:

Once completed, run update.php to update any changes to the database. Set site back to production mode, re-applying any customization as necessary.

APT-GET

• Clean up non-existent data
  
  # apt-get autoclean
• Update list
  
  # apt-get update
• Install/update a package
  
  # apt-get install <pkg>
• review dist-upgrade prior:
  
  # apt-get -Vsu -o Debug::pkgProblemResolver=yes dist-upgrade
• Apply updates
  
  # apt-get -Vu upgrade
• Upgrade all dependencies
  
  # apt-get -Vu dist-upgrade
• Search cache
  
  # apt-cache search <pkg>
• Remove and purge packages
  
  # apt-get --purge remove <pkg>

DPKG

• Install/Update package
  
  # dpkg -i <pgk>
• Check listing of installed packages
  
  # dpkg -l *<pkg>*
• file belongs to
  
  # dpkg --search /path/to/file
• List of file in package
  
  #dpkg -L <pkg>
• Info about package
  
  # dpkg -s <pkg>

SERVICES

• Manage services at init levels.
  
  # sysv-rc-conf
# update-rc.d

The below notes is specifically for centos-4.6 :

Installation:

Instantiating svn:

Initial svn import:

Instantiating trac:

Install trac plugins:

trac.ini conf setup:

Apache trac conf setup:

Apache subversion conf setup:

Trac privileges:

Login as the admin user and setup Trac plugins, permissions etc...

Cluster SSH opens terminal windows with connections to specified hosts and an administration console. Any text typed into the administration console is replicated to all other connected and active windows. This tool is intended for, but not limited to, cluster administration where the same configuration or commands must be run on each node within the cluster. Performing these commands all at once via this tool ensures all nodes are kept in sync.

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PowerTOP is a Linux tool that finds the software component(s) that make your laptop use more power than necessary while it is idle. As of Linux kernel version 2.6.21, the kernel no longer has a fixed 1000Hz timer tick. This will (in theory) give a huge power savings because the CPU stays in low power mode for longer periods of time during system idle.

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I was getting the below error in my mail error log files:

Apparently a bug in ubuntu dapper, where libmail-spf-query-perl depends on libsys-hostname-long-perl.

Doing an `apt-get install libsys-hostname-long-perl` resolved the issue.

Apache Tomcat is a web container, or application server developed at the Apache Software Foundation (ASF). Tomcat
implements the servlet and the JavaServer Pages (JSP) specifications from Sun Microsystems, providing an environment for Java code to run in cooperation with a web server. It adds tools for configuration and management but can also be configured by editing configuration files that are normally XML-formatted. Tomcat includes its own internal HTTP server.

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iplist allows users with no or basic knowledge of iptables to filter (e.g. to block) network traffic based on (automatically updated) lists. These lists have various formats and are sorted by different categories (e.g. countries,
adware, corporations).

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FreeNX is a system that allows you to access your desktop from another machine over the internet. You can use this to login graphically to your desktop from a remote location. One example of its use would be to have a FreeNX server set up on your home computer, and graphically logging in to the home computer from your work computer, using a FreeNX client.

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