The error message 'success' looks indeed very strange. Has there been any problems with using apt thereafter?
** Changed in: apt (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/668289 Title: package apt 0.7.25.3ubuntu9.3 failed to install/upgrade: erro ao escrever em '<standard output>': Sucesso -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs