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ESET's state-of-the-art scanning engine with unsurpassed scanning speed and detection rates combined with a tiny footprint makes ESET Server Security for Linux (ESSL) the ideal choice for any server on Linux.

The main functionality is covered by the On-demand scanner and On-access scanner (Real-time file system protection).

The On-demand scanner can be started through the command line interface, the web interface, or the operating system's automatic scheduling tool (for example, cron). The term On-demand refers to file system objects being scanned by either user or system demand.

The On-access scanner is invoked whenever a user or operating system attempts to access file system objects. Thus a scan is triggered by any attempt to access file system objects.