Bashoneliners

We aim to collect practical, well-explained bash one-liners, and promote best practices in shell scripting. 

http://www.bashoneliners.com/

Purging i386 Packages From AMD64

After trying out the free demo of X-Plane and removing it from my 64bit installation, I wanted to purge all the i386 packages I no longer needed ( 224 packages ).

After some Google search I found this one-liner :

sudo apt-get purge  `dpkg --get-selections | grep i386 | awk '{print $1}'`

To simulate the above command you can add the -s option and see exactly what gets removed before actually running it....

sudo apt-get -s purge  `dpkg --get-selections | grep i386 | awk '{print $1}'`

After this operation, 492 MB disk space will be freed.
Do you want to continue [Y/n]? y
.......
.......
Removing libao4:i386 ...
Purging configuration files for libao4:i386 ...
Removing lib32asound2 ...
Purging configuration files for lib32asound2 ...
Removing nvidia-304 ...
......

I only had to reinstall nvidia-304 afterwards...

Links : http://askubuntu.com/questions/113301/how-to-remove-all-i386-packages-from-ubuntu-64bit
https://kura.io/2010/07/02/using-dpkg-selections-to-backup-and-install-packages/
http://linuxprograms.wordpress.com/tag/dpkg-get-selections/
http://www.cyberciti.biz/faq/bash-scripting-using-awk/

Manage Trash With Trashindicator

Download trashindicator_1.00-1_all.deb from http://code.google.com/p/trashindicator/downloads/list

Open terminal and navigate to Downloads :
cd Downloads
Installation :
sudo dpkg -i trashindicator_1.00-1_all.deb

Trashindicator will be added to the Startup Applications in System Settings.

Restart wingpanel :
killall wingpanel or log out and log in again.

Show Username On Wingpanel

In terminal :
gsettings set com.canonical.indicator.session show-real-name-on-panel true
then :  
killall wingpanel

Done...

Remove username :
gsettings set com.canonical.indicator.session show-real-name-on-panel false
then : 
killall wingpanel

Hiding Applications Slingshot-Launcher

Open Terminal and navigate to /usr/share/applications :
cd /usr/share/applications

E.g. I wanted to remove the icon Archive Manager from slingshot :

sudo nano file-roller.desktop

Add a line NoDisplay=true

Hit Ctrl+O , Enter and then Ctrl+X

http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#recognized-keys

Use Pepperflash In Chromium

Go to the Google Chrome Webpage and download the web browser for your processor architecture.
Unpack the deb package:

Navigate to /opt/google/chrome/PepperFlash/ and extract libpepflashplayer.so :

Then :
cd Downloads
sudo mv libpepflashplayer.so /usr/lib/chromium-browser/plugins

Edit the file /etc/chromium-browser/default :
sudo nano /etc/chromium-browser/default and make the following change :

# Options to pass to chromium-browser
CHROMIUM_FLAGS=" --ppapi-flash-path=/usr/lib/chromium-browser/plugins/libpepflashplayer.so"

Restart chromium....

Check the setting at chrome://plugins in the address bar ( press +Details ) :

White Sands Wallpaper Pack

Images taken in southern New Mexico in a national park called White Sands.

Wallpaper pack can be downloaded from this site.

PLEASE mind the terms of use and do not re-host these images anywhere else on the web......
the images are for your own personal use only as desktop wallpaper imagery and other uses of these images without written permission is not tolerated.