Add this Breakpoint as Function Breakpoint:
Now Visual Studio will break as soon as the Windows kernel tries to read a file for your application under debugging.
Probably this does not catch all reads, as there is also ReadFileEx, ...
Want to teach children how to develop Android apps using MIT App Inventor? Have problems with an unstable or missing Internet connection? Use a local installation of MIT App Inventor on your Windows PC. Here's how:
Download VirtualBox from https://www.virtualbox.org/wiki/Downloads
Download App Inventor Appliance
. They host a preconfigure virtual machine that runs an offline MIT App Inventor server. It contains some additional FTC stuff, but you can ignore that if you want. Download the Local App Inventor applicance file for Windows.
Start VirtualBox. In the menu, go to File / Import Appliance... . Select the appliance file you downloaded from FTC. After it is imported, select the new virtual machine 'LocalAppInventor', go to settings and select Network. Make sure Adapter 1 is enabled and set to 'Attached to: NAT'. Go to Advanced' / Port Forwarding and set up a new rule with Protocol: TCP, Host Port: 8888, Guest Port: 8888.
Launch Virtual Machine
In Virtual Box click on Start. After a few minutes everything should be running. Check that the screen shows a running App Inventor after some time.
Share your WiFi connection
Enable a WiFi hotspot on your Laptop to allow the children to connect their laptops to yours. You can follow the instructions from windowscentral.com.
Here are the steps I that I found useful for my transition from using Windows 10 to using Fedora 23 (x64 / workstation):
- Download Fedora 23 Workstation from getfedora.org.
- First I tried (without success!) to copy the ISO file Fedora-Live-Workstation-x86_64-23-10.iso to my USB stick via UNetBootin. Reboot Windows, but press SHIFT when clicking on Reboot to get the different restart options (like boot from USB). That seemed to work at first, but then the Live Fedora did not boot through to the desktop but hung somewhere in the middle. Copying the ISO file with dd if=the_iso_file.iso of=/dev/sdb bs=1M did the trick. Be very sure about what /dev/sdb is before writing to it!
sudo dnf -y update
- Mount Windows drive to /win:
sudo mkdir /win
- Install Google Chrome
sudo rpm --import https://dl-ssl.google.com/linux/linux_signing_key.pub
sudo sh -c 'echo "[google-chrome]
name=Google Chrome 64-bit
baseurl=http://dl.google.com/linux/chrome/rpm/stable/x86_64" >> /etc/yum.repos.d/google-chrome.repo'
- Alternative for line above for x86 (32 bit) only:
sudo sh -c 'echo "[google-chrome]
name=Google Chrome 32-bit
baseurl=http://dl.google.com/linux/chrome/rpm/stable/i386" >> /etc/yum.repos.d/google-chrome.repo'
sudo dnf install google-chrome-stable
- Install Visual Studio Code
sudo mkdir /opt/vscode
sudo unzip VSCode-linux64.zip
sudo ln -s /opt/vscode/VSCode-linux-x64/Code /usr/local/bin/code
- Install Qt
sudo dnf install mesa-libGL-devel
sudo dnf groupinstall "C Development Tools and Libraries"
sudo dnf install qt5-qtbase qt5-qtbase-devel
hostnamectl set-hostname --static "ultra"
- Install Thunderbird
- Copy profile from Windows to Linux:
cp /win/Users/xxx/AppData/Roaming/Thunderbird/Profiles/krb2tad7.default/prefs.js /home/xxx/.thunderbird/vvspfz6z.default
sudo usermod -a -G vboxusers USER
- Enable SSH server
sudo chkconfig sshd on
sudo service sshd start
- Play MP3s
sudo dnf install gstreamer-plugins-base.i686
sudo dnf install gstreamer-plugins-base
sudo dnf install gstreamer1-libav gstreamer1-plugins-good gstreamer1-plugins-ugly gstreamer1-plugins-bad-free gstreamer-ffmpeg gstreamer-plugins-good gstreamer-plugins-ugly gstreamer-plugins-bad gstreamer-plugins-bad-free gstreamer-plugins-bad-nonfree
- Truecrypt 7.1
- Run script on startup:
Comment=execute script startup.sh
- Verify/add with
gnome-tweak-tool / Startup Applications
- Change waterdrop sound in Terminal to bell sound
sudo wget http://cgit.freedesktop.org/sound-theme-freedesktop/plain/stereo/bell.oga?id=38bc773912317a2163083b6f483fbc8e6fb61123 -O /usr/share/sounds/freedesktop/stereo/bell.oga
- Custom keyboard layout:
- I prefer the layout ¨
English (US, international with dead keys)¨ but without the dead keys:
- In Gnome Activity Launcher, type: region
- Add keyboard layout ´
English (US, international with dead keys)´
- Edit file /usr/share/X11/xkb/symbols/us
- Find entry English (US, international with dead keys
- The next few lines, change all words like
- For key <AC11> change [ acute, diaeresis, apostrophe, quotedbl] to [ apostrophe, quotedbl ]
- Show icons on desktop
- gnome-tweak-tool must be installed
sudo dnf install gnome-tweak-tool
- In Desktop / Icons on Desktop: ON
- To get custom desktop shortcuts on the GNOME desktop, put .desktop file into ~/Desktop, make sure they are executable (
chmod u+x ~/Desktop/*.desktop)
- example file /home/USER/Desktop/keepass.desktop:
Comment=execute script keepass.sh
- Other packages needed
sudo dnf install vim vim-enhanced octave keepass
- sudo dnf groupinstall "Development Tools"
- Some 3rd party packages (like the MIT App Inventor aiStarter) need these 32 bit libs:
sudo dnf install zlib.i686 libstdc++.i686
Some useful keyboard shortcuts:
- In Nautilus: Press
CTRL+L to enter an arbitrary path
WIN+RIGHT moves windows within one display.
WIN+SHIFT+RIGHT moves windows to another display
ALT+F2: Run commands
On Windows you can record your screen to an .mp4 file using ffmpeg:
- Download ffmpeg for Windows from http://ffmpeg.zeranoe.com/builds/
- Run e.g. with following command:
ffmpeg -f gdigrab -framerate 30 -show_region 1 -i desktop out.mp4
(the capture devices
did not work for me on my Windows 10 machine, they were not even listed in the available video devices.)
For details see ffmpeg's https://trac.ffmpeg.org/wiki/Capture/Desktop
On Windows 10, you can also try to use Windows' Screen Recording to record a window. Just press Win+G and check Yes, this is a game. Afterwards you get a Record button. Your recordings will be saved to
You can automatically attach the Visual Studio Just-In-Time debugger when a process is started on Windows. The steps are simple:
- Open the Registry Editor
- navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
- Select the application you want to debug:
- Either it already exists as subkey, then use that one
- Or, you have to create a new key in Image File Execution Options with the name of the application (e.g. chrome.exe)
- Create a new string value with name debugger and name vsjitdebugger.exe
My Virtual Machine was running very slow in VirtualBox 4.3.28. Unbearable slow. I though I remembered running it faster, but I wasn't sure.
Indicators for the problem I'll describe next are:
- In CPU-Z the VT-x feature is missing in the Instructions list of the CPU.
- In VirtualBox's Create New dialog box only 32-bit OS are shown.
- In VirtualBox's settings of an existing VM, the Acceleration tab in the System settings is disabled/grayed out.
After some googling around at the wrong corners of the Internet I found this post by vonnie mentioning that maybe on my Windows 8.1 host the feature Hyper-V was enabled. I think this steals the VT-x functionality somehow for usage by itself. Disabling this feature boosted the performance of my VMs dramatically!
To disable Hyper-V in Windows 8.1 go to Turn Windows features on or off via Windows' search functionality (hotkey: Win+Q). You'll have to reboot.
These screenshots have been taken after fixing the problem:
I needed an example device for tests of an implementation of a serial connection terminal. A Raspberry Pi is especially suited: It dumps a lot of kernel data upon boot and it listens for input as soon as the login prompt appears (after about one minute).
- FTDI serial cable to USB converter TTL-232R-3V3 from http://www.ftdichip.com/
- Raspberry Pi
- Jump wires male - female
Wiring is simple: Just connect the FTDI cable as shown in the sketch below:
- FTDI GND -> RaspPi GND
- FTDI TXD -> RaspPi RXD
- FTDI RXD -> RaspPi TXD
- Fire up PuTTY and setup as in the following screenshot (speed/baud rate = 115200)
- Press "Open" and you should receive the kernel boot messages followed by a login prompt.
The following configures git to use VIM as the default editor (e.g. for commit messages) on Windows:
git config --system core.editor 'C:\\PROGRA~2\\Vim\\vim73\\gvim.exe' --wait
- Uses short directory names. You can find these using e.g.:
dir /X "C:\Program Files (x86)*"
Notice the star at the end of the command line. This will reveal the short name
- Use double backslashes
- Use single quotes
- Use the
--wait option after closing the single quotes for the path to the VIM editor
I installed JIRA on my Ubuntu 14.04 machine according to
What was missing was the https support, i.e. the support for secure data transfers.
Here, I followed
Install https support as follows on the command line:
sudo $JAVA_HOME/bin/keytool -genkey -alias tomcat -keyalg RSA -keystore $JIRA_HOME/jira.jks
Enter keystore password: *****
What is your first and last name? : machine return a few times ... yes ... return
$JAVA_HOME/bin/keytool -certreq -keyalg RSA -alias tomcat -keystore $JIRA_HOME/jira.jks -file $HOME/jira.csr
$JAVA_HOME/bin/keytool -list -alias tomcat -keystore $JIRA_HOME/jira.jks
sudo cp /opt/atlassian/jira/conf/server.xml /opt/atlassian/jira/conf/server.xml.bak
sudo vi /opt/atlassian/jira/conf/server.xml
Contrary to Atlassian's documentation, you have to specify attributes
keystorePass in the
Connector element in the
server.xml file, e.g.:
<Connector port="8443" protocol="org.apache.coyote.http11.Http11Protocol" maxHttpHeaderSize="8192" SSLEnabled="true" maxThreads="150" minSpareThreads="25" enableLookups="false" disableUploadTimeout="true" acceptCount="100" scheme="https" secure="true" clientAuth="false" sslProtocol="TLS" useBodyEncodingForURI="true" keystoreFile="/opt/atlassian/jira/jira.jks" keystorePass="******"/>
Then stop'n'start JIRA:
sudo service jira stop
sudo service jira start
Now try to open following URL in your browser (replace 'machine' by your host name):