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本文讨论了UNIX-like系统的数据安全性问题,并对其中的一种系统,UNOS,进行了较深入的分析,针对系统在数据安全方面的问题进行了改进。改进后的系统能有效地防止一般用户对系统数据的非授权存取活动;对特权用户admin的各种特权实现了合理的控制与监控,从而保证了系统中共享数据和个人数据的安全。对用户用机情况和非授权活动进行了登录。通过查阅这些纪录发现了某些学生企图窃取他人劳动的活动,通过开展批评教育等提高了上机实践的自觉性,增强了教学效果。
This article discusses the UNIX-like system data security issues, and one of the systems, UNOS, conducted a more in-depth analysis of the system for data security issues have been improved. The improved system can effectively prevent unauthorized access to the system data by the average user. The various privileges of the privileged user admin can be reasonably controlled and monitored to ensure the security of the shared data and the personal data in the system. Log on to user’s machine situation and non-authorized activities. By referring to these records, it was found that some students attempted to steal other people’s work activities. By criticizing and educating others, they increased their awareness of practical experience and enhanced their teaching effectiveness.