Upgrade debian from wheezy to jessie

This process took me a long time (days in preparation!), but it’s good to do it right.

What i wanted to do was upgrade my asus eee laptop from debian 7 to 8 (wheezy to jessie), so i read around the topic a lot, using google searches and of course the debian instructions, which can sometimes be quite verbose but also have a lot of good stuff. In addition there’s specific instructions for the asus eee.

For the upgrade itself i followed the excellent clear instructions at howtoforge

It took a whole afternoon, the “apt-get upgrade” alone took an hour, much longer than i had read.

At a certain point i got this horrifying screen:


So i needed to go to the debian forums to ask for help about that but ultimately it worked out fine and everything seems to be in order.

Now running Jessie!

As a last point. it shouldn’t need saying but remember to back up all valuable documents!!! This would for me include gpg keys, emails, pictures, films,  writing, bookmarks (chromium, iceweasel, midori), zotero,  passwords and so on. If things had gone to shit (as at a certain point it seemed like it was) at least i still had everything saved on an external hard drive and ready to be reinstalled.

[Solved with xrandr] Dim screen using Twilight, Redshift etc

I’ve never liked staring at a bright computer screen, not so much because it keeps me awake (although maybe it does), more because it hurts my eyes.

On my fone i use Twilight, which works great and is easy to adjust. On laptops, normally i turn the screen right down, but i realised i could probably try something like twilight on the laptop also.

So i tried redshift, but it didn’t work because geoclue wasn’t configured or something. I found a tip on how to give latitude and longtitude, but it still didn’t work. Here’s the tip though:

enter the following in terminal:

redshift -l [LAT]:[LON]

(replacing [LAT]:[LON] by your latitude and longitude)

Anyhoo, redshift adjusts the screen according to the position of the sun, but i just want a way to dim the screen…

F.lux and g.lux aren’t in synaptic, neither is iris (not iirsih, an Irish dictionary for the ispell spell-checker program) and neither is calise, but that works using the webcam, which i rather keep covered up

so instead of using an installed program, none of which actually seem to work that well anyway, how about using a terminal command?

instant justice thanks to ubuntubuzz

xrandr --output LVDS1 --brightness 0.5

the value on the right is the important bit, so 1 for normal, 0.5 for dimmed, 0.1 for superdark, 2 for bright and so on…

job done

or is it?

further reading to be done on backlight and xgamma