Erlend's Lookout Post

Concerning ns-3, Xubuntu and other stuff.

Change video orientation metadata


Download ffmpeg.

After that, do this:

ffmpeg -i input.mp4 -c copy -metadata:s:v:0 rotate=0 output.mp4

“Auto-scale” pyplots

xdiff = (xmax-xmin)*0.05 # 5%

ydiff = (ymax-ymin)*0.05 # 5%

ax.set_xlim(xmin=xmin-xdiff, xmax=xmax+xdiff)


Fix dropbox icon in Xubuntu


In you terminal run
sudo gedit /usr/bin/dropbox

Create a new line after import os and add the following:
os.environ['DBUS_SESSION_BUS_ADDRESS'] = ""

Save and reboot

Wireless on nx6325 and Xubuntu 16.04

Basically just do this:

sudo apt-get purge bcmwl-kernel-source broadcom-sta-common broadcom-sta-source && sudo apt-get install b43-fwcutter firmware-b43-installer

Remove the ethernet cable.

Restart computer.


Source: easylinuxtipsproject

Auto-mount host folder in virtualbox

Do the tip here:


In short:

Install guest-os-additions

Add user to vboxfs user group:
sudo usermod -a -G vboxsf USER

Create easy accessible symbolic link:
sudo ln -s /media/sf_Share /home/<>/Share

Enable auto-mount for the shared folder:
You may go to Device->Shared Folder Settings, edit the shared folder, and enable Auto-mount.

Install Google Earth (not pro) on XUbuntu 14.04


sudo apt-get install googleearth-package
make-googleearth-package --force
sudo apt-get install gdebi
sudo gdebi googleearth*.deb

Import olsrd into Eclipse

This is to avoid all sorts of red markers on the right hand side (potential compilation errors). I have not yet tried to compile this. Just browsing at the moment:

  1. Create new makefile project with existing code.
  2. Set project path to be the top directory olsrd.
  3. Make sure to select the Linux toolchain (or the correct one for your environment).

That’s it.


If problems starting Xming applications, disable some security on the windows machine.

git aliases

Here are some nice-to-have aliases and config setup for git:

git config --global checkout
git config --global branch
git config --global commit
git config --global status
git config --global alias.fe fetch
git config --global push
git config --global alias.pu pull
git config --global alias.unstage 'reset HEAD --'
git config --global credential.helper cache
git config --global credential.helper "cache --timeout=86400"
git config --global core.editor nano
git config --global color.ui true

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