[Solved] Linux: make screenshot of the virtual screen

Make screenshot on display 1 with the imagemagick

DISPLAY=:1 import -window root screen.png

Source: Xvfb and Firefox headless screenshot generator « Ivan Villareal.

[SOLVED] Running headless on Linux

First, install a VNC server:
sudo apt-get install vnc4server

Next, start and configure the server:
vncserver

At this point, it should ask you to create a password for VNC. Do so, then continue.

Start a VNC screen on screen 99:
vncserver :99

If that goes through alright, then kill the screens created. (For me, when I ran vncserver for the first time, it created a screen at :1, so we'll kill both of the screens created)
vncserver -kill :99
vncserver -kill :1

Done. Now, it "just works."

Source: http://forums.adobe.com/thread/740482

[SOLVED] Linux: resize all images via console

Just install ImageMagick if you dont have it yet

sudo apt-get install imagemagick

Resize all JPG files in to desired size

mogrify -resize 640x480 *.jpg

Source: http://www.baptiste-wicht.com/2010/09/tip-batch-resize-images-on-ubuntu-linux/

[SOLVED] Android. Get Signing certificate fingerprint (SHA1)

While creating the Client ID in the Google APIs Console you will be asked for
"Signing certificate fingerprint (SHA1):"

to obtain this fingerprint just run:

keytool -list -alias temp -keystore /path/to/your/keystore_file

you will be asked fot password and the Certificate fingerprint (SHA1) will be shown


"keytool comes with the Java SDK. You should find it in the directory that contains javac, etc."
via http://stackoverflow.com/a/2998451/47399 

[SOLVED] Install mod_pagespeed on ubuntu x64

Just run this in your console

wget https://dl-ssl.google.com/dl/linux/direct/mod-pagespeed-stable_current_amd64.deb
sudo dpkg -i mod-pagespeed-*.deb
sudo apt-get -f install
sudo service apache2 restart

done. Now your page is faster. Check your page for chages - you will find many "pagespeed.ce.fm5FGAHKsn.css" like optimisations

 

More info on installation: https://developers.google.com/speed/docs/mod_pagespeed/download

[SOLVED]GAE:Make dev_appserver accessible from outside

Just start the appserver with the adress flag
$dev_appserver.py --address=0.0.0.0 ./src/

by default the appserver will be started with the localhost IP 127.0.0.1 and not accessible from outside

Source: https://developers.google.com/appengine/docs/python/tools/devserver

[SOLVED]Pull new updates for forked Github repository

Just run this in your forked git location:

$ cd github-services
$ git remote add upstream git://github.com/<user>/<repository>.git
$ git fetch upstream

Source: http://stackoverflow.com/questions/3903817/pull-new-updates-for-forked-github-repository

[SOLVED] Hibernating your ubuntu via console

Just run this in console:

sudo /usr/sbin/pm-hibernate

For locking your session and hibernating just run:

gnome-screensaver-command -l && sudo /usr/sbin/pm-hibernate

[SOLVED] Increase YouTube upload limit from 15 minutes, to 12 hours

If you are getting "Upload HD videos in various formats up to 15 minutes." in youtube.

Just got to http://www.youtube.com/my_videos_upload_verify and verify your account.

 

[SOLVED] Fix permissons in linux

Just do:

to fix files permissions

find . -type f -exec chmod 644 {} \;

to fix folders permissions

find . -type d -exec chmod 755 {} \;

[SOLVED]No WebGL in Google Chrome v21 on Ubuntu 12.0

If your Google Chrome keeps saying you that your graphic card is not supported however you see WebGL stuff in your Firefox.

Just write

chrome://flags

in the adress bar of your chrome

And enable the "Override software rendering list Mac, Windows, Linux, Chrome OS".

Don't forget to restart the browser

[SOLVED]Connect Nexus 7 and/or Galaxy Nexus to ubuntu

You want to develop on your new shiny Nexus 7 and

adb devices

keeps giving you

???????? device

oprn your rules file

gksu gedit /etc/udev/rules.d/51-android.rules

probably you will see following line (if you already configured your Galaxy nexus) If not add it to the file, just in case

SUBSYSTEM=="usb", ATTR{idVendor}=="04e8", ATTR{idProduct}=="6860", MODE="0666", OWNER="YOUR_USER_ID"

Now we should get the idVendor and idProduct from the Nexus 7. Connect it to your computer and

lsusb

you will see something like

Bus 001 Device 013: ID 18d1:4e42 Google Inc.

we need this two values

paste this string with proper values to 51-android.rules

SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e42", MODE="0666", OWNER="YOUR_USER_ID"

Save the file. Do the

sudo service udev restart

Now run

adb devices

you should see your device

List of devices attached
015d172c98280c0b device

Happy developing

Source: http://govfate.iteye.com/blog/1608379

[SOLVED]The workspace exited with unsaved changes in the previous session;

Fix eclipse crash by removing the .snap

From: workspace\.metadata\.plugins\org.eclipse.core.resources\.snap

Source: Refreshing workspace to recover changes ... crash / Dev-Articles / DracoBlue.

[SOLVED] Android: Samsung Galaxy Tab 10.1 on Ubuntu

Just follow this tutorial http://forum.xda-developers.com/showthread.php?t=1077377

My 64bit RULES FILE:

ACTION!="add", GOTO="gtab_rules_end"
SUBSYSTEM!="usb|usb_device", GOTO="gtab_usb_end"

ATTRS{idVendor}=="04e8", ATTRS{idProduct}=="685e", MODE="0777" SYMLINK+="gtab"

LABEL="gtab_usb_end"

LABEL="gtab_rules_end"

[SOLVED] Install PIL on Win x64

Goto http://www.lfd.uci.edu/~gohlke/pythonlibs/ and install e.g. PIL-1.1.7.win-amd64-py2.7.‌exe (=2.7 version of your python)

After you Install the PIL you can check if everything went right (you will need some image to do it)

Open console

C:\Python27>python
Python 2.7.2 (default, Jun 12 2011, 14:24:46) [MSC v.1500 64 bit (AMD64)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import Image
>>> im = Image.open('test.png')
>>> im.show()
>>>

If you have no errors everything went right

[SOLVED] Chrome silent print (without print confirmation)

You can do if you start your chrome (v18+) with the --kiosk --kiosk-printing switches.

You can see it from this video 

[SOLVED] Perl: How to replace umlauts with regex

You have a string with umauts you want to replace

$strNewXml = "ÜBERSICHTSKARTE MIT HIGHLIGHTS";

To replace "Ü" use \xdc where "dc" is a Hex value of the "Ü" character from this table

http://www.pjb.com.au/comp/diacritics.html

$strNewXml =~ s/\xdcBERSICHTSKARTE MIT HIGHLIGHTS//g;

 

 

[SOLVED] Ubuntu: Fixing messed up screen resolution

If you messed up with your display resolution try this:

To configure the monitor and display adapter, you need to re-configure 
your Xorg server. To do that, first backup your xorg.conf file by 
executing the following command:

   # sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf_backup

then, stop X by executing the following command (this will put you to 
text only mode):

   # sudo /etc/init.d/gdm stop

You can do the whole X configuration process by executing:

   # sudo dpkg-reconfigure xserver-xorg

Once you have re-configured Xorg,  start GNOME again by executing this 
command:

   # sudo /etc/init.d/gdm start

Source: lists.ubuntu.com