User “ahmed” owns a directory, “stuff,” containing a text file called “ourstuff.txt” that he shares with users belonging to the group “staff.” Those users may read and change this file, but not delete it. They may not add other files to the directory. Others may neither read nor write or execute anything in “stuff.” What would appropriate ownerships and permissions for both the directory “stuff” and the file “ourstuff.txt” look like?
Answer to relevant QuestionsA computer has a cache, main memory, and a disk used for virtual memory. If a referenced word is in the cache, 20 ns are required to access it. If it is in main memory but not in the cache, 60 ns are needed to load it into ...UNIX treats file directories in the same fashion as files; that is, both are defined by the same type of data structure, called an inode. As with files, directories include a 9-bit protection string. If care is not taken, ...Consider an automated audit log analysis tool (e.g., swatch). Can you propose some rules which could be used to distinguish “suspicious activities” from normal user behavior on a system for some organization? Explain the rationale behind the three-tier client/server architecture. The following FORTRAN program is to be executed on a computer, and a parallel version is to be executed on a 32-computer cluster. L1: DO 10 I = 1, 1024 L2: SUM(I) = 0 L3: DO 20 J = 1, I L4: 20 SUM(I) = SUM(I) + I L5: 10 ...
Post your question