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Top Forums Shell Programming and Scripting Why do we use sort before compare ? Post 302257877 by otheus on Thursday 13th of November 2008 09:23:40 AM
Old 11-13-2008
The short answer is: it's the only way to find a reasonably small change-set between two files. For the long answer, perhaps you should look up research papers on sorting and searching. Or, take some phone books and try it yourself.
 

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FAXANSWER(8C)															     FAXANSWER(8C)

NAME
faxanswer - tell a HylaFAX server to answer the telephone SYNOPSIS
/usr/sbin/faxanswer [ -q queue-dir ] [ -h how ] modem DESCRIPTION
faxanswer sends a message to the HylaFAX faxgetty(8C) process servicing modem telling it to answer the telephone. This is useful, for example, when a modem is used on a shared phone line and the server is configured to not normally answer the phone. The specified modem can either be the name (typically the last component of the terminal port the modem is attached to), or the full name of the associated FIFO named pipe file, e.g. ``FIFO.ttym2''. OPTIONS
-q dir Use a spooling area other than /var/spool/fax. -h Specify exactly how the phone should be answered. By default, the server process is instructed to answer the phone and accept any kind of call (voice, data, fax). Discrimination of the type of call is dependent on a modem's adaptive-answer support. The -h option can be used to force the server to answer the phone for particular type of call: one of fax, data, voice, any, extern (to force faxgetty to invoke an external application to to handle the call), or dialX (where X is a dialstring to dial before initiating a fax reception). If using dialX, the specified dialstring will likely need to end with a semicolon (``;''). FILES
/var/spool/fax default spooling area /var/spool/fax/FIFO fifo for contacting faxq Consult hylafax-server(5F) for a complete discussion of the structure and content of the spooling area. SEE ALSO
hylafax-server(5F), faxgetty(8C) May 23, 1996 FAXANSWER(8C)
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