Describe two advantages of building packages with RPM.
What will be an ideal response?
Packages built with RPM have the following advantages:
· Upgrading - You can upgrade packages to a newer version without losing the previous version's customization settings because configuration files are preserved. In addition, special upgrade files aren't needed because you use the same file to install and upgrade an RPM package.
· Uninstalling - You can uninstall packages more quickly because you don't need to worry about the different locations where the application has stored its files. RPM makes all the necessary deletions automatically (but preserves configuration files).
· Verification - You can verify a package to make sure you haven't deleted a file that was necessary for it to run correctly. If you have, you can then restore the missing file or reinstall the package. In this case, RPM retains any settings you have changed in the package files.
· Querying - The RPM utility has options that enable you to search for packages or just certain files. RPM packages contain files that store metadata. RPM can query these files to discover useful information about the package.
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How does piping work on the command line?
What will be an ideal response?
The function fgets() returns ____ when it detects the end of a file.
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