If you want to use ColorZilla on Ubuntu Feisty it may not work out of the box. So here is a little tutorial to get it running. (I am using Firefox 2.0.0.6 on Ubuntu Feisty) -> Should be upgraded to 2.0.0.7 now

• Download libxpcom* for Firefox ColorZilla (VS von 2.0.0.7). Alternatively you can download the newest Release of firefox from www.mozilla.com and extract firefox/libxpcom*. You only need this 3 files.
• Copy the 3 files as root to /usr/lib/firefox/

  cd /path/to/ff-libxpcom
sudo cp libxpcom* /usr/lib/firefox

  Note: I had firefox running and as I started copying firefox crashed. (So If you do not close it before it will do it for you )

• Install ColorZilla from https://addons.mozilla.org/de/firefox/addon/271

Now the Eyedropper-Tool should work. I waited a long time for such a tool =)

EDIT: Seems that other extensions are too affected such as greasemonkey or firebug. An alternative would be to install firefox the normal way and do not use the ubuntu-firefox version but I heard there are some problems with sound and flash… You can download the current one here: libxpcom* for Firefox ColorZilla (VS von 2.0.0.11), VS 2.0.0.13.

If I screencast something, than most of the time I do it with recordMyDesktop which produces .ogg-Videos. If you need to convert it so you can show it to your friend or upload it to a video hosting page like youtube or so you have to convert it into another format. I chose avi as format.

Simply fire up this command to convert your file:

mencoder out.ogg -o out.avi -oac mp3lame -ovc lavc

• out.ogg is the .ogg-file you want to convert
• out.avi is the .avi-file you want to create
• mp3lame is the used audio-codec (here mp3)
• lavc is the used video-codec (here libavcodec)

For more information you can look at the MPlayer manual page.

Every now and then I need to get thumbnails of my pictures. I found some solutions, that create thumbnails, but none of them gave attention to the orientation of the image. So if I wanted to resize the images to 640×480 than the landscape pictures had a correct resolution of 640×480px but the portrait pictures had something like 640×850 or even 640×480 (deforming the picture to landscape). So I wrote a script to do this job for me.

Installation

You need to install imagemagick to get the script working. (sudo apt-get install imagemagick).

I installed the script as nautilus-script.

1. Download the thumbnail-script and modify the script to your needs (See more at the bottom)
2. Create the folder “~/.gnome2/nautilus-scripts/” and copy the script into this folder named create_tn
3. Make it executable
   (chmod a+x ~/.gnome2/nautilus-scripts/create_tn)
4. Restart nautilus per killall nautilus

5. Now you can start the script by going into the folder where your original images are and right click anywhere in the white area or on a file and select Scripts -> create_tn.

Now the script creates thumbnails of all the images of your current directory and places it into the subfolder thumbnails.

Modify the script to your needs

• Change the resolution of the thumbnails: Change the variables long and short in line 4 and 5. eg. use long=”1024″ and short=”768″ if you want a landscape resolution of 1024×768 and portrait resolution of 768×1024.
• Ask every time for a resolution: If you want every time another resolution just uncomment the lines 11-14. Now you can enter every time you start the script a resolution like 800×600 or 1024×768 so width x height without spaces.
• Use a better quality: The script uses a quality of 80% for image resizing. If you need a better one you can change it in line 34 by modifying the number after “-quality”. So you can replace 80 by 60, 100 or every other integer number you want.

Script-Sourcecode

If the Download from Rapidshare does not work you can copy and save the source:

#!/bin/bash
# Define a fixed resolution
long=“110″
short=“82″
## Enter a resolution every time
## Uncomment the next lines if you want to enter the resolution
## each time manually
#resolution=`zenity –entry –text=”Resolution: (eg. 1024×768)”`
#posx=`expr index $resolution x`
#long=${resolution:0:$posx-1}
#short=${resolution:$posx}
# Filecount for progressbar
progress=0
filecount=`find -maxdepth 1 -iname “*.jpg” | wc -l`
let “inc=100/$filecount”
mkdir -p thumbnails
# Creating thumbnails
(for i in *.jpg *.JPG; do
echo “$progress”;
echo “# Resizing $i”;
width=`identify -format %w $i`
height=`identify -format %h $i`
if [ $width -ge $height ]; then
size=“${long}x${short}”
else
size=“${short}x${long}”
fi
convert -resize $size -quality 80 $i thumbnails/$i
let “progress+=$inc”
done
) | zenity –progress –title “$Creating thumbnails…” –percentage=0

If you want to send an E-Mail quickly per Mozilla Thunderbird in Nautilus like the Send To Feature you have to write a little script. (I found a .deb for replacing Evolution with Thunderbird, but it did not work. Instead it killed the whole feature. At the end you will get a menu like the one in the screenshot on the right.

1. Because I do not need Evolution in Nautilus I removed the nautilus-sento app. To do this execute the following: sudo apt-get remove nautilus-sendto.
2. Create a file in ~/.gnome2/nautilus-scripts named sendto.
3. Make it executable with chmod a+x sendto
4. Paste the following one-liner into the file and save it
   thunderbird -compose attachment="file://$NAUTILUS_SCRIPT_SELECTED_FILE_PATHS"
   Note: If you have Thunderbird 1.5 (or minor?) you must replace “thunderbird” with “mozilla-thunderbird”.
5. Restart Nautilus with killall nautilus

Now you can right click on a file and select Scripts -> sendto to send a file as an attachment in Thunderbird.

For more scripts you can goto Nautilus File Manager Scripts.

If you work a lot on a PC you should also take many breaks. If you are like me and forget about this very often you could use this trick to force yourself to take the break.

Go to System -> Preferences -> Keyboard. In this Keyboard Preferences dialog switch to the Typing Break tab and select the following:

• [x] Lock screen to enforce typing break
• Work interval lasts eg. 45 minutes
• Break interval last e.g 3 minutes
• [ ] Allow postponing of breaks. (disabled for me because otherwise I would postpone it everytime )

Now you have to take a break every 45 minutes for at least 3 minutes. You should stay up go to the toilet or simply move and stretch your body.

Another possibility is to archive this is to use the external tool workrave.

Last time I had the following situation: I wanted to remote connect to my workstation from another workstation like in the following image:

My current workstation is the left one (I will call it “workstation“) and I want to connect to the computer on the right (”server“). The workstation is running Windows XP, the server is running on Ubuntu Feisty.

1. Setup Server(SSH+VNC): You have to install SSH and activate the VNC-Server, to be able to securely connect to your server.
   1. Install SSH: Just install the SSH server by entering the following in bash:
      sudo apt-get install ssh
   2. Enable VNC: VNC is already installed on yor Ubuntu system, so you only have to enable it. Navigate to System -> Preferences -> Remote Desktop. Now you should activate “Allow other users to view my desktop“, “Allow other users to control my desktop“, and for security purpose “Require the user to enter this password” and provide a secure password. Then click the Close-button. Now your VNC-server should be ready to use.
2. Setup Rooter (SSH Forwarding). If your server is directly connected to the internet (modem) you can skip this step. On my SMC-router this feature is called virtual server. You have to forward the SSH-port (22) to the IP address of your server. (here: 192.168.123.2)
3. Download and Install Putty: If you search Google for putty, the first result will be a download page, where you should download eighter the windows installer (putty-0.60-installer.exe) or the single putty program (putty.exe) . (I placed the single file into %windir%\system32 for fast access per Start -> Run.)
4. Start Putty and set it up:
   1. Start putty.exe (e.g. if you put it in system32 per Start -> Run putty.exe
   2. Enter the hostname, you want to connect to on the first startpage “Session“. Here this is the router. You have to enter the external IP (in concreto: 80.80.205.145). If your “server” is directly connected to the internet you have to enter the external IP of your server. (This is the case if you have only a single PC and this PC is directly connected to the modem of your provider.
   3. Setup a tunnel by going to “Connection -> SSH -> Tunnels“. Here you enter as source port 5900 (the default VNC-Port which is used by Ubuntu if you installed it like me). As Destination you enter the internal server-ip with the VNC-Port (in concreto: 192.168.123.2:5900) and Click Add. Make sur, that you use the internal IP of your server not e.g. an IP-Adress of your router. (I made this mistake and wondered why nothing happend )
   4. Save your session and connect, so you can recall it later quickly by going back to “Session”. Type a meaningful name for your session below the “Saved Session” label and click “Save“. Now you can restore your session always by selecting it and click “Load“. Now you can click “Open” to connect to your server.
5. Connect to your workstation: Now you will get a window where your username and password will be asked. Enter you login credentials to connect to your server and establish a SSH-tunnel.
6. Connect to your server using VNC:
   1. Download and install VNC. There are lots of free VNC apps for windows out there e.g. UltraVNC or TightVNC. Note that you only need the viewer.
   2. Start the vncviewer and connect to localhost (127.0.0.1) and enter your password which you provided in step 1.2.
   3. Now you should be connected to your home server

You know the picture on the left? You have a pdf-document with comments? You hover over it with evince and what happens? Nothing! I searched for information about how I can read the comment in the pdf with the default viewer evince.

I found nothing so I thought maybe acroread can do this. This is the Adobe Acrobat Reader for Linux. This worked

1. Get acroread per sudo apt-get install acroread.
2. Open your pdf: acroread /path/to/your/file.pdf.
3. Hover over the comment.

It’s a pity that evince does not support comments. For me the goal

“to replace the multiple document viewers that exist on the GNOME Desktop with a single simple application“

is not yet achieved. (Printing multiple pages on one A4 sheet does not work too).

Yesterday I bought a new 500GB harddisk It was formatted with NTFS but I wanted a linux-filesystem. I thought I should give XFS s shot because ext3 is working for me now.

I formatted the disk with the GParted LiveCD but you can also do it with gparted installed in Ubuntu (use apt-get install gparted to get it.) To format the the device simply choose the correct harddrive on the left top and then right click the partition and choose Format to > xfs.

I wanted to name it “media” because of its future content. So I tried the “Set Disklabel” Function but this seems to be for anything other than a Disk Label. In Windows it was rather easy to change the name of a disk per F2 but in Ubuntu *ouch*.

After some searching I found a Guide for renaming USB Drives. And you know what xfs was missing :’( Maybe nobody has an USB Drive formatted with xfs but what about a normal harddisk?

So I continued searching and found a tool collection named xfsprogs. I apt-get it and than wrote xfs in the bash and pressed <TAB> to list the tools.

guru@guru-desktop:~$ xfs
xfs_admin    xfs_copy      xfs_growfs    xfs_logprint  xfs_quota
fs_bmap      xfs_db        xfs_info      xfs_mkfile    xfs_repair
fs_check     xfs_freeze    xfs_io        xfs_ncheck    xfs_rtcp

xfs_admin sounded nice so I read its man page. Here my full proceeding: (Note: Change sdb1 to your disk)

1. Get xfstools with sudo apt-get install xfsprogs
2. Unmount the device if it is mounted (sudo umount /dev/sdb1)
3. Label it with xfs_admin -L media /dev/sdb1
4. Mount it.
5. If you formatted it you may have no access to your drive. I solved it by changing the owner to my user instead of root. I do not know if this is the best way, but it worked for me
   sudo chown guru:guru /media/media

Thats it. It would be so easy if it where in the context menu of sdb1 or so.

For other filesystems see: https://help.ubuntu.com/community/RenameUSBDrive

You sure hear of Ubuntustudio which was released recently. “A multimedia creation flavor of Ubuntu. Ubuntu Studio is aimed at the GNU/Linux audio, video and graphic enthusiast as well as professional.” Maybe you have seen the nice theme too (like the screenshot on the right)

I will show you now how you can get this theme on your ordinary Ubuntu Feisty.

1. Add the ubuntustudio repository to you sources.list and download the key and update:
   sudo su -c 'echo deb http://archive.ubuntustudio.org/ubuntustudio feisty main >> /etc/apt/sources.list'
wget -q http://archive.ubuntustudio.org/ubuntustudio.gpg -O- | sudo apt-key add - && sudo apt-get update
2. Then install the packages as follows:
   sudo apt-get install ubuntustudio-gdm-theme ubuntustudio-icon-theme ubuntustudio-look ubuntustudio-screensaver ubuntustudio-theme ubuntustudio-sounds
I am neither sure if you need all this packages nor if there are some missing, but for me it worked fine
3. Now activate the theme and wallpaper:
   1. Go to System -> Preferences -> Theme.
   2. Scroll down and choose UbuntuStudio (a nice dark theme).
   3. Click Apply Background
   4. Click Close
4. If you want you can change the login manager too. (I did not because I use autologin and personally find the default ubuntu login manager nicer.
   1. To do this go to System -> Administration -> Login Window
   2. In the Local-Tab choose Ubuntu-Studio and click Close.

PS: The sound will be automatically applied. For the screensaver I do not know what is the ubuntustudio screensaver but it seems you have to set it manually.
Source: http://www.ubuntu-austria.at/printview.php?t=397&start=0

The first things I do after having “bloody” new operating system set up is to – if not previously installed – install firefox and some extension I need for “daily” tasks.

The first one I think is always PwdHash which generates per-site-passwords on the fly in combination with your master password, so I can login to the bunch of websites where I am registered. Just install it and press F2 when you are in the password box, then enter your password and press Submit. The extension automatically generates the password, so that key loggers have no chance.

Call me paranoid but I use site-specific master passwords too. So like the first and last letters of the website domain with different case combinations and a static part.

The next one is Greasemonkey which executes little JavaScript-programs on every site. My favorite user script is AutoLoginJ which automatically logs you in on website where you have your password stored.

After some time of surfing I discover the annoying ads popping out everywhere. The simple solution Adblock Plus which protects me from the time-stealing layer-ads.

After a while I tend to visit del.icio.us to extend my bookmark list. If I see a nice website I want to simply add this page to my bookmarks without going to the del.icio.us page, the click post and the copy the page title to the description field. So I install the del.icio.us Extension (VS 1.2) because version 1.5 works too slow for me. Sure it has more features but I am satisfied with the features of VS 1.2.

The last one I install after some downloads is Download Statusbar which makes downloads a lot easier because it simply shows your downloads in a bar at the bottom, so you always have an overview and can do all important download-related tasks at one place.

In another profile I often install the Web Developer Extension for detecting the structure of a website. This helps a lot when designing a new page. But at the time I have other things to do

You may post your favorite extensions without you cannot live.