Please note: I’m assuming you still use the default theme. Things will be slightly different with other themes, but in general the same principal should apply.

In the file header.php remove media=”screen” from the following line:

<link rel="stylesheet" href="<?php bloginfo('stylesheet_url'); ?>" type="text/css" media="screen" />

In style.css, just before the line

/* Begin Typography & Colors */

Add

@media screen {

At the bottom of the file add the following line:

}
@media print {
    /* style sheet for print goes here */  
   #sidebar { display: none; }
}

Bingo no wasted paper from printing the side bar.

special_remote:
  debug_print = "R: special_remote for $local_part@$domain"
  driver = dnslookup
  domains = pobice.com
  local_parts = lsearch;/etc/exim4/non_local
  transport = remote_smtp
  ignore_target_hosts = 127.0.0.0/8
  no_more

I then have entered the local_parts into a file.  Everything else then gets bounced, rather than been forwarded and bounced later on.

Word of warning – I’m no exim expert, but this seems to do the trick for me.

For this to work you have to:

1. Have a CPU that support Frequency Scaling
2. Have CPU Frequency scaling working
3. Use NUT (Network UPS Tools)

Here what you need to do to get thing working

• Check you what ‘Governors’ you have available
  You need to make sure the correct modules are loaded so that you can scale to the correct settings. To see what you do have loaded run:
  cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
  You’ll need at least powersave and one other. Powersave should set the CPU Frequency to the lowest setting. If you don’t have powersave you’ll need to load the module. As root run:
  modprobe cpufreq_powersave and add cpufreq_powersave to the file
  /etc/modules.

  To test that it is working, ideally run something that force you CPU to 100 for a while (say compress a large folder) and then run
  cpufreq-selector --governor powersave
sleep 1
cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
cpufreq-selector --governor userspace
sleep 1
cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq

  The first number given should be the lowest CPU frequency and the last should be the highest (assuming the process is using a lot of CPU time still)

• Add a few new items to upssched.conf
  Using you’re favorite editor open up /etc/nut/upssched.conf and add the following line:
  AT ONBATT * START-TIMER powersave 30
AT ONLINE * CANCEL-TIMER powersave
AT ONLINE * START-TIMER userspace 30
AT ONBATT * CANCEL-TIMER userspace
  I’ve used a timer (30 seconds) to smooth out jumpy power from triggering off any actions.
• Add the command to the CMDSCRIPT file to change the CPU frequency govenor

Edit the cmdscript file (the path is given in upssched.conf on the line starting CMDSCRIPT. This file probably doesn’t exist – so just create a new one. Assuming it doesn’t exist add the following lines:
#! /bin/sh
case $1 in
powersave)
/usr/bin/cpufreq-selector --governor powersave && logger -t upssched-cmd "Setting CPU Governor to powersave"
;;
userspace)
/usr/bin/cpufreq-selector --governor userspace && logger -t upssched-cmd "Setting CPU Governor to userspace"
;;
*)
logger -t upssched-cmd "Unrecognized command: $1"
;;
esac

• Test Unplug you’re UPS for 1 min, plug back in and look at /var/log/syslog – you should see that NUTs has throttled you’re CPU.

I haven’t had a power cut since I’ve implemented this, but from looking at the stats from the UPS I should gain another 7 min or so of battery time – an extra 21%. An improvement on this may be stopping some process and task when on battery and starting them again when back on mains. But for now, at least untill the next power cut this will do for me.

Well I’ve done something about it (well at least on my blog) – I’ve changed my theme so that on browsers that supports css and media types the sidebar shouldn’t print out. Here’s how you can add this to you’re WordPress blog

1. Create a file print-style.css in the directory for you’re current theme with the following content
   .dontprint{ display: none; }
div#menu{ display: none; }
2. In wordpress, goto Presentation, Theme Editor and select the file Header
3. Just bellow the line setting the css style sheet – should be something like this :
   <style type="text/css" media="screen">
@import url( %lt;?php bloginfo('stylesheet_url'); ?> );
<style>

   add the lines
   <style type="text/css" media="print">
@import url(<?php bloginfo('template_directory'); ?>/style-print.css);
</style>
4. Hopefully this should be enough, but if the theme author hasn’t used the div’s in the sidebar file you may have to add this line <div id="menu"> to the top of the file and this line </div> to the bottom of the file

To add it back add the following line to /etc/vim/gvimrc

" Also switch on highlighting the last used search pattern.
if has("syntax") && (&t_Co > 2 || has("gui_running"))
syntax on
set hlsearch
endif