Interaction of solid matter with an intense, short-pulse laser (< picosecond pulse duration) is a rich and active area of research because of its potential in producing bright x-ray source and high-quality charged particle beams. In the high-intensity laser-matter interaction, electrons are accelerated to the relativistic energy (> MeV) predominantly by the electric fields. The propagation of those energetic electrons in the solid produce x-rays and charged particles such as protons and ions. Characterization of the electrons is the first step to understand the physics of short-pulse laser matter interaction. We have performed experiments to determine the electron characteristics with a wide variety of laser conditions at various laser facility around the world including a university scale Leopard laser at Nevada Terawatt Facility, TITAN laser at Lawrence Livermore National Laboratory, OMEGA EP laser at University of Rochester and LFEX laser at Osaka University, Japan.