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/dev/null

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Top Forums Shell Programming and Scripting /dev/null
# 8  
Old 06-20-2008
Not really

I would say its a good practice to redirect STDOUT and STDERR to a log file. When something is not working you have logs to check that.
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LEARN ABOUT OPENSOLARIS

mailstats

mailstats(1)							   User Commands						      mailstats(1)

NAME

       mailstats - print statistics collected by sendmail

SYNOPSIS

       mailstats [-o] [-c ] [-C configfile] [-f statisticsfile]
	    [-p] [-P]

DESCRIPTION

       The  mailstats  utility	prints out the statistics collected by the sendmail(1M) program on mailer usage. These statistics are collected if
       the file indicated by the StatusFile configuration option of sendmail (defined in /etc/mail/sendmail.cf)  exists.  The  default	statistics
       file is /etc/mail/statistics.

       To enable mailstats, you must, as root, touch /etc/mail/statistics. See the StatusFile processing option in sendmail(1M).

       mailstats  first  prints  the  time  that  the statistics file was created and the last time it was modified. Then, the statistics for each
       mailer are displayed on a single line, each with the following whitespace-separated fields:

       M	     The mailer number.

       msgsfr	     Number of messages from the mailer.

       bytes_from    Kbytes from the mailer.

       msgsto	     Number of messages to the mailer.

       bytes_to      Kbytes to the mailer.

       msgsrej	     Number of messages rejected by the mailer.

       msgsdis	     Number of messages discarded by the mailer.

       msgsqur	     Number of messages quarantined by the mailer.

       Mailer	     The name of the mailer.

       The display of statistics described above is followed by a separation line containing only equal sign (=) characters. After the	separation
       line,  a  line  preceded  with a "T" and totaling the values for all of the mailers is displayed. This is followed by another line preceded
       with a "C" that lists the number of TCP connections.

       To reinitialize the statistics file once a night, add an entry to root's crontab(1):

	 mailstats -p > /dev/null

OPTIONS

       The following options are supported:

       -c		    Try to use submit.cf instead of the default sendmail configuration file.

       -C configfile	    Specify a sendmail configuration file.

       -f statisticsfile    Specify a sendmail statistics file.

       -o		    Do not display the name of the mailer in the output.

       -p		    Output information in program-readable mode and clear statistics.

       -P		    Output information in program-readable mode without clearing statistics.

USAGE

       See largefile(5) for the description of the behavior of mailstats when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).

FILES

       /dev/null		Zero-lined file

       /etc/mail/statistics	Default sendmail statistics file

       /etc/mail/sendmail.cf	Default sendmail configuration file

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsndmu 		   |
       +-----------------------------+-----------------------------+
       |Output Stability	     |Unstable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       crontab(1), cron(1M), sendmail(1M), attributes(5), largefile(5)

SunOS 5.11							    24 Jun 2004 						      mailstats(1)