Today I ran through an exercise of restoring a ZFS pool. The beginning of one hard drive participating in the pool (no raidz) was incidentally overwritten.. by me. I’m glad I noticed the mixup and cancelled dd, but still 60MB was gone. I spent a few evenings analysing and fixing the MBR, partition table and… Read More »
VirtualBox does not support resizing its virtual storage devices. As a workaround, a new bigger VDI is created and the existing partition(s) are moved to the larger drive. This tutorial gives instructions on how to expand storage for Ubuntu Linux guest machine.
Here is a C# helper class that encrypts and decrypts data using the AES 128-bit algorithm. It can be used (after through testing, of course) to pass data between a .NET application and any other application using OpenSSL. Most of the credit belongs to Deusty blog. I have added a compatible Encrypt method. When encrypting,… Read More »
I decided to switch to Python while developing the embedded client in C language. There was not much work done anyway, and faster coding with Python should allow me to catch up. Luckily the socket part is in working condition. It was tested in Ubuntu Linux and OpenWrt router firmware v8.09 based on 2.4 kernel.… Read More »
I’ve been working on a project that uses the inexpensive and easily obtainable and programmable LCD panel from Nokia 3310 mobile phone. I’m posting some of the source code here because it was quite hard to find a ready-made driver on the web. The code was tested on an ARM-based microcontroller. Add pin definitions, sleep… Read More »
In this part of the tutorial, the source code for creating a Java server socket is given. The server code is deployed as a .jar file. The JAR file also contains the public and private key pair (keystore server.private) and the public key of the client (client.public). The example contains a hard-coded password for the… Read More »
The purpose of this tutorial is to show how create a client-server connection through a secure SSL socket. The client is an embedded system running an application (written in C) under embedded Linux. First, SSL certificates for authenticating both server and client will be created using Java’s keytool. My goal is to connect the client… Read More »
The code example shows how to invoke methods with one-line call. It does not require writing explicit delegates, works in .NET 2.0 and later by accessing outer variables (text in the example) from an anonymous method. Invoke() method can be used instead of BeginInvoke(). C# code: