Here is another written biography of Lon Nol. Just like Thay and PraChanMouy said, Lon Nol is in fact a history now. According to the article below, it says that Lon Nol died since 1985. Since then 19 years have passed. Why are you interested in learning about him?
Lon Nol was born on November 13, 1913 in Prey Veng province. He was a long time social servant first under the French colonial administration and later under Sihanouk. Because of his loyalty to Sihanouk, Lon Nol was assigned various important portfolios within the Sihanouk regime, including chief of police, governor, command-in-chief and minister of defense and prime minister twice from 1966 to 1967 and again in 1969.
In 1970, as Prince Sihanouk’s hold on power began to slip, Lon Nol with hesitation, collaborated with Prince Sisovath Sirik Matak to overthrow Sihanouk in a coup d’etat, abolishing the monarchy and declaring Cambodia a republic with himself as the president. Lon Nol proved to be an incompetent leader who made decisions based on mystical beliefs rather sound judgment when faced with stiff challenges from Vietnamese forces and Khmer Rouge. His government was ripe with corruption. In 1971, Lon Nol suffered a serious stroke. His regime was sustained by massive US military assistance and a long-term bombing campaign. He went into exile in Hawaii just days before the Khmer Rouge soldiers entered Phnom Penh on April 17, 1975. Lon Nol lived there until 1979 and then moved to California where he died in November, 1985.
http://www.seasite.niu.edu/khmer/Ledgerwood/biographies.htm