4Linux is a Linux and free software consulting, training, support and development company with infrastructure and security focus.
We provide support for the biggest bank in Brazil, the Caixa Econômica Federal (one of the world's biggest free software case); created the HackerTeen, a young people educational project considered unique by Havard Business School; and many other like the São Paulo Subway System, Brazilian Mint, Ceagesp Agricultural Warehouse, and the Center for the Dissemination of Technology and Culture (CDTC), a partnership between IBM and ITI.