Just because you're thinking about moving into the cloud doesn't mean architecture is no longer important. In fact, it's more important than ever. You'll probably have business services that are designed for reuse that should be stored in a private or public cloud that need to be designed for reuse. You will likely have a hybrid environment that needs to be well planned to conform to your company's service level agreement and performance requirements.
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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