Although some companies have the sophistication to build their own clouds, they're the exception. Most companies need help, so don't go into this alone. An entire industry is just waiting out there to help you. Don't ignore it. Beg, borrow, steal, but get help. Talk to your peers who have done some early cloud projects. Consult with systems integrator, technology companies, and other consultants who have solid experience with best practices. Some cloud Web sites and organizations have great ideas and collaboration opportunities.
The setuid permission on an executable file means that the command will run as the user owning the file, not as the user that ran the command. One example is the passwd command: [student@desktopX ~]$ ls -l /usr/bin/passwd -rw s r-xr-x. 1 root root 35504 Jul 16 2010 /usr/bin/passwd In a long listing, you can spot the setuid permissions by a lowercase s where you would normally expect the x (owner execute permissions) to be. If the owner does not have execute permissions, this will be replaced by an uppercase S . The special permission setgid on a directory means that files created in the directory will inherit their group ownership from the directory, rather than inheriting it from the creating user. This is commonly used on group collaborative directories to automatically change a file from the default private group to the shared group, or if files in a directory should be...
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