Linux script rmq - get a summary of a mail queue.

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City LinUX sample scripts - rmq

NAME

rmq - checks the mail queue on a remote server.

SYNOPSIS

rmq [ -c <config> ] [ -d ] [ -v ] [ -V ] < clientid >

AVAILABILITY

rmq is a Bourne shell script which should work equally well on all versions of UNIX, Linux and Mac OS X.

DESCRIPTION

rmq uses ssh and sudo where necessary to return a summary of the current mail queue on a remote server. The configuration file ( /usr/local/etc/rmq.cf by default) is used to determine the mail transfer agent on the remote host and relevant hostname using the " client id " supplied on the command line. If the configuration file does not exist or there is no entry for the client id supplied, rmq will assume that " client id " = " hostname ".

The script assumes that trying to use root to probe remote systems will lead to problems so attempts to run with an id less than 500 cause an error and the script terminates.

OPTIONS

-c <config_file> Use the named configuration file in preference to the default " /usr/local/etc/rmq.cf ".

-d Start in debug mode. The script will run in a shell with the -x option set.

-l The summary returned is logged using the local syslog facility. This is particularly useful for compiling reports on the number of checks made and facilitates calculation of the average queue length.

-v Set verbose mode. Ordinarily rmq operates silently unless problems are detected. In verbose mode rmq reports on each significant action and returns a list of items in the queue.

-V Print version details and exit.

EXAMPLES

rmq -l  billpayers

Using the client id " billpayers " as the look up key, rmq will extract the details of the remote host and mail transport agent being used.

FILES

.IR /usr/local/etc/rmq.cf

BUGS

The script has more error checking than most but is still quite crude having been developed to resolve specific client issues. File permissions are critical and sudo is be used execute commands where root privileges are required.

AUTHOR

Clifford W Fulford, City Linux. Contact fulford@fulford.net or +44 (0)709 229 5385.

Trainer

Picture of Clifford W Fulford - IT consultant
Clifford W Fulford BA(Hons), PGDip (Computing), PGCE. DES/DFE No. 7773034.

I started my career in computing in the days of CPM and C/CPM, building network operating systems and correcting bespoke software written to manage community transport booking and accounting systems.

I fist came across UNIX when called upon to migrate database systems from Mercator BBS to Thoroughbred Basic. Excited by the power and flexibility of UNIX in 1989/90 I studied the OS at City University night classes while developing my practical skills in a SCO Xenix environment during the working day.

In 1994 I was introduced to Linux by students in the School of Mathematics and Computing at North London University. Although initially sceptical of the ability of the fledgling OS to meet the requirements of large scale mission critical systems, I rapidly became a convert to Linux in a corporate environment.

I have now worked professionally as a systems manager and systems administrator with Xenix, AIX, HPUX, SunOS, Solaris and Linux in the City, Antwerp, McLean Virginia, Cairo, Birmingham and Nottingham for over 25 years

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