Looking for Equivalent sofware package of PSpice in ubuntu

hi, i'm an electrical engineering student. I've to use PSpice software in MS Windows. U know, PSpice is a powerful circuit simulator. Is there any proper equivalent software package in Ubuntu, which offer circuit simulation in "text based" & "Graphics based" like PSpice? I've explored "Synaptic package Manager" & found some Electronics software package but I don't know which need to be installed! can u help me..