putty and Ctrl + s that blocks screen

When you press Ctrl + s under putty, then your linux session will freeze and screen will not update. In my case I mostly had to restart my session which was quite annoying even though I use screen. Quicker solution is to press Ctrl + q. This is what many websites/blogs will tell you.

I am writing it here just to remind me of it, since I constantly forget that trick.

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