The damping decrement of Landau damping and the effect of thermal velocity on frequency spectrum of propagating wave in a bounded plasma column are investigated. The magnetized plasma column partially filling a cylindrical metallic tube is considered to be collisionless and non-degenerate. The Landau damping is due to the thermal motion of charge carriers and appears whenever the phase velocity of the plasma waves exceeds the thermal velocity of carriers. The analysis is based on a self-consistent kinetic theory and the solutions of the wave equation in a cylindrical plasma waveguide are presented using Vlasov and Maxwell equations. The hybrid mode dispersion equation for the cylindrical plasma waveguide is obtained through the application of appropriate boundary conditions to the plasma–vacuum interface. The dependence of Landau damping on plasma parameters and the effects of metallic tube boundary on the dispersion characteristics of plasma and waveguide modes are investigated in detail through numerical calculations.