Discuss the tenant's and the landlord's basic duties under a landlord-tenant relationship

The tenant's basic duties under a landlord-tenant relationship are the following: pay the rent and any other covenants under the terms of the lease agreement (i.e. security deposit, utilities, insurance, repairs, taxes), use the premises for a proper purpose, don't damage the premises, do not disturb the other tenants; basic tort duties of care for the rented premises.
The landlord's basic duties under a landlord-tenant relationship include: the duty to deliver possession of the premises at the beginning of the tenancy, duty to provide quiet enjoyment of the premises; duty to maintain the premises according the lease terms, according to the building codes, and to maintain the premises in a habitable condition; duty to timely return the security deposit or provide the tenant with an accounting of the security deposit; and basic tort duties of care.