This blog contains some important fundae for linux users, which may look very trivial, but are very useful.

FAM (File Alteration Monitor)

The File Alteration Monitor (FAM) monitors changes to files and directories in the filesystem and notifies interested applications of these changes. Your application can use FAM to get an up-to-date view of the filesystem rather than having to poll the filesystem. This chapter describes the required libraries and provides a basic list of steps for using FAM.
Reference: sgi techpub library

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