Men greeting Men – A handshake with the right hand is common in most situations. Handshakes are often given with both hands or with the left hand touching/holding the right upper arm.  Handshakes tend to be energetic and very often linger a bit.  Good friends may engage in light hugs with pats on the shoulders.  It is also appropriate for two men to walk hand in hand in public. This does not have any implication on their sexual preferences; it's just a sign of friendship and closeness.

Women greeting Women – A handshake, verbal greeting, or nod of acknowledgment is common in most situations.  Good friends and family will often exchange kisses on each cheek.

Meetings between Men and Women – A handshake or nod of acknowledgment is common in most situations.  In rural areas the nod is more common while in urban areas it is the handshake. Good friends and family often exchange kisses on each cheek.  

Note: Greeting people is very important, even if you don’t know them