Unix

Unix Following is all the information that you need to understand the workings of the UNIX operating system (Berkley 4.2). Patched together by The War On the security side of UNIX: ----------------------------- On the Security of UNIX Dennis M. Ritchie Recently there has been much interest in the security aspects of operating systems and software. At issue is the ability to prevent undesired disclosure of information, destruction of information, and harm to the functioning of the system. This paper discusses the degree of security which can be provided under the system and offers a number of hints on how to improve security. The first fact to face is that was not developed with security, in any realistic sense, in mind; this fact alone guarantees a vast number of holes. (Actually the same statement can be made with respect to most systems.) The area of security in which is theoretically weakest is in protecting against crashing or at least crippling the operation of the system. The problem here is not mainly in uncritical acceptance of bad parameters to system calls there may be bugs in this area, but none are known- but rather in lack of checks for excessive consumption of resources. Most notably, there is no limit on the amount of disk storage used, either in total unix, file, files, user, system, directory, security, users, uid, set-uid, one, program, write, version, protection, password, information, command, read, process, each, special, programs, passwords, others, number, name, example, disk, bits, access, should, permission, encrypted, available, writing