git - How to replace master branch in Git, entirely, from another branch?

stackoverflow 

How to get out of projector mode (Win 7) - black screen

I was stuck on windows reboot, after having tried to connect my windows laptop to a projector.
I could see just black screen, it was scaring.

Solution: Hold [Windows key] + P
source

Uninstall Logitech GHUB from Mac

• Delete the G Hub application from /Applications
• Trash the entire folder lghub at ~/Library/Application Support/
• Trash ~/Library/Application Support/Logitech/Gaming/ghubDevices.json
• Trash settings.json from that same folder

Source

default spring security in spring-boot app

If you include this dependency in your pom:

 groupId: org.springframework.boot
 artifactId: spring-boot-starter-security


you "inherited" the default spring security.
When you application starts, have a look to this message:

Using generated security password: 03219696-3a8d-49d5-8385-11e84fe94ac8

Then if the login mask shows up:

Type this:

user: user
password: that password in the message...