This exercise is from the Theory Section on the CAGED system.

Here is the basic C minor scale played in open position (the lowest possible position on the fretboard), then at the octave (12th fret) position.

Both scales span 1 octave each (i.e. from C through to the next highest C).

In open position first play the C minor chord. Followed by the C minor Scale:

C - D - Eb - F - G - Ab - Bb - C

Then up at the 12th fret play the higher C minor chord. Followed by that C minor Scale:

C - D - Eb - F - G - Ab - Bb - C

Notice that both C chords / scales are similar shapes. The first finger is used to 'replace' the open notes for the second chord / scale at fret 12.

Practice both scales until you are very familiar with them. Get faster and more regular with them. Use different methods to practice them, i.e. Ascend and descend through the notes. When ready, move to the next CAGED scale: A minor.

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NB - Comparing the C Major and C minor scale, notice that only 3 notes are different - the 3rd, 6th and 7th are flattened (i.e. lowered by 1 fret):

If you wish to brush up, you can learn more about major and minor scale construction here. (Backtrack to the start of that section if you get lost!)