There's a lot of confusion about learning scales; people feel they have to learn every single one by heart in order to know them but there's a quick and dirty solution that can make your life easier: learn to look for patterns.

There are 12 notes in the Equal Temperament Scale of Western music. That's it. Learn the 12 of them and you know every note you're going to need to know. 

The really good news about that collection of 12 notes is that they repeat over and over and over all over the neck in easy to memories patterns and sequeneces: learn a pattern in one place and it's very likely to be the same somewhere else.

Don't worry though, this isn't going to be a deep dive into the theory and mechanics behind the construction 0f the Scales so don't worry, you don't need to know any esoteric theory to follow this and get a firm grasp of the Scales.

Below is the pattern for C Major (C-D-E-F-G-A-B-C) starting from C at the 3rd fret on the A string.

You can take this pattern and move it to the 8th fret on the E string and even up to the 15th fret on the A string and it's the exact same shape and pattern of moves and will use the same 8 notes and create the same C Major scale.

Learn this pattern and move it around. Pay close attention to how the notes sound 1 after the other; you'll notice that where you play this shape, the intervals will all sound the same no matter what notes are played.

Let's take a look at the minor Scale pattern.

Again, we're starting off on C at the 3rd fret on the A string.

C minor uses the notes C-D-Eb-F-G-Ab-Bb-C and, as before, you can move this pattern to the 8th fret on the E string or the 15th fret on the A string and it will be the same pattern and produce the same scale of C minor.

Feel free to download and keep these for reference. Hope they help.

Happy jamming.