Notes on technology and stuff

Here's an alternative to using the well known keyboard combinations Ctrl+c  (to copy) and Ctrl+v  (to paste). Copy : Press  Ctrl + Insert Paste : Press  Shift + Insert In some terminal windows you copy text by simply selecting it using the mouse, and you paste by either right-clicking (PuTTy) or using the middle mouse button (Ubuntu).

The problem After downloading Oracle SQL Developer version 4.1.3 with JDK (64 bit) and unzipping it to C:\Program Files\ it won't start. The following error message is presented when running sqldeveloper.exe Unable to launch the Java Virtual Machine Located at path: C:/Program Files/sqldeveloper/jdk/jre/bin/server/jvm.dll My setup: Windows 10 No Oracle client installed No Java installed There are suggestions out there saying that you should mess with SetJavaHome in the sqldeveloper.conf file. Others talk about properly setting java environment variables. But the reality is that SQL Developer does not require any other Oracle components to be installed in order to run. The changes might fix some problems for some people, but it's not relevant to my situation. The solution Copy the file msvcr100.dll from C:\Program Files\sqldeveloper\jdk\jre\bin\ to C:\Program Files\sqldeveloper\sqldeveloper\bin\

"This connection has limited or no connectivity" after upgrading to Windows 10 After upgrading my laptop from Windows 7 to Windows 10 it started having intermittent problems with Wi-Fi connectivity. It would connect to my Wi-Fi networks, but occassionally it would give the message below "This connection has limited or no connectivity" Troubleshooting would always show that there was nothing wrong with the network. There was nothing wrong with the laptop, since it could connect to other networks. Windows would simply decide that a particular Wi-Fi network can't be used to access the Internet. Rebooting, disabling the network adapter and many other things I tried to reset it did not help. I found two ways to solve the "limited or no connectivity" Wi-Fi issue thanks to a blog post linked at the bottom of this post. Here are the short versions of the tips that worked for me.

Pressing CTRL+S in PuTTY disables the output to screen. It will appear as if your connection is dead, since you won't see anything happening when you type commands. The fix is to press CTRL+Q  to enable output again. No need to open a new session to the server. Whatever you've typed while output was off (after CTRL+S) will be visible and you can keep working. CTRL+S sends XOFF CTRL+Q sends XON

goqr.me is a great website for quickly creating QR codes for free I was recently in need of a way to quickly create a QR code. The site I ended up using is super easy to use and can be used for free. It's not bloated with ads, pop-ups or other annoyances. No need to register or give up your e-mail address. Just choose the type of QR code in step 1, and enter the text/URL or other contents in the box. That's all! You can now choose the size of the image and download your QR code. In short: if you need a quick and easy way to generate a QR code, for free, give goqr.me a try. goQR.me