relative tuning of your guitar

Relative tuning is comparing the sound and pitch of adjacent strings. The string with the higher pitch is tuned to match the sound of the lower string. In this method, there is the assumption that the lower string is tuned properly. If you use this method, you will have to tune the sixth string with a tuning fork or piano. More details on this will be provided later.
The process starts with the tuning of the sixth string. When the sixth string has been tuned, you need to press the sixth string at the fifth fret and pick the string. Next, tune the fifth string so that it matches that sound. The sound of the fifth string should match the sixth string’s, fifth fret. If you find that the sound does not match, turn the tuning peg for that fifth string and change the pitch. Don’t do anything to the sixth string.
If the sound of the string is too low, tighten the string. If the sound of the string is too low, loosen the string. Be sure that the fifth string is tuned in comparison to the sixth string because the fifth string has to be properly tuned in order to tune the fourth string. After that, the fourth string needs to be in tune in order to tune the third string and it continues from there. If there is a tuning mistake on any of the strings, the sound of the whole instrument will be thrown off.
If you have a piano at your disposal and you are familiar with the notes, you can tune your instrument by matching the sound of the strings with the matching notes on the piano.
To begin, find the E note of the piano and then play the sixth string or E note on your guitar. Turn the tuning peg so that the sixth string on your guitar sounds like the E on the keyboard. Do this with all the stings on the guitar.