What is SemVer or Semantic Versioning?

In the Linux world, kernel releases follow MAJOR.MINOR.PATCH version format.

Semver is a similar concept. It advises to follow a simple set of rules:

1. Major version is changed for incompatible changes.
2. Minor versions are changed for new functionality
3. Patch version is changed after bug fixes.

Versions are always incremented and reset to zero:

1. Patch version is set to zero if the Minor version is changed
2. Patch and Minor versions are set to zero if the Major version is changed.

References

https://semver.org/

Problems and solution: Uninstalling VirtualBox old version

I had VirtualBox 3.2.8 installed on my system (Windows XP, i686). When I tried to install latest version 4.1.8, the installation sequence asked to uninstall version 3.2.8 and that required executable file of VirtualBox3.2.8.

Which I had deleted! 😦

Now, what to do?

• I deleted VirtualBox folder from my program files directory.
• Then, my friend Chetan suggested me to remove registry entries. Run “regedit” in ‘Start->Run’.
• Now search(ctrl+F) for “virtualbox”; you would get many keys. The registry editor has two panes. Right side shows the key value and left side shows the containing location.
• On the left pane, look out for folder that is in “open” icon (there would be only one folder looking different from others). Delete this folder.
• Keep searching for the string by “F3” and keep deleting these folders.
• You should get a message from Windows that registry scan finds no such word now.
• Now, try installing VirtualBox. It worked for me 🙂