amq(8)
NAME
amq - automounter query tool
SYNOPSIS
amq [ -fmpqsvwHTU ] [ -h hostname ] [ -l log_file ] [ -x log_options ] [ -D debug_options ] [ -P program_number ] [[ -u ] directory ... ]
DESCRIPTION
Amq provides a simple way of determining the current state of amd program. Communication is by RPC. Three modes of operation are supported by the current protocol. By default a list of mount points and auto-mounted filesystems is output. An alternative host can be specified using the -h option. If directory names are given, as output by default, then per-filesystem information is displayed.
OPTIONS
-f Ask the automounter to flush the internal caches and reload all
the maps.
-h hostname
Specify an alternate host to query. By default the local host
is used. In an HP-UX cluster, the root server is queried by
default, since that is the system on which the automounter is
normally run.
-l log_file
Tell amd to use log_file as the log file name. For security
reasons, this must be the same log file which amd used when
started. This option is therefore only useful to refresh amd's
open file handle on the log file, so that it can be rotated and
compressed via daily cron jobs.
-m Ask the automounter to provide a list of mounted filesystems,
including the number of references to each filesystem and any
error which occurred while mounting.
-p Return the process ID of the remote or locally running amd.
Useful when you need to send a signal to the local amd process,
and would rather not have to search through the process table.
This option is used in the ctl-amd script.
-q Suppress error messages produced when attempting synchronous
unmounts with the -u option.
-s Ask the automounter to provide system-wide mount statistics.
-u Ask the automounter to unmount the filesystems named in
directory instead of providing information about them. Unmounts
are requested, not forced. They merely cause the mounted
filesystem to timeout, which will be picked up by amd's main
scheduler thus causing the normal timeout action to be taken.
If the -u option is repeated, amq will attempt to unmount the
file system synchronously by waiting until the timeout action is
taken and returning an error if the unmount fails. Any error
messages produced may be suppressed with the -q option.
-v Ask the automounter for its version information. This is a
subset of the information output by amd's -v option.
-w Translate a full pathname as returned by getcwd(3) into a short
Amd pathname that goes through its mount points. This option
requires that Amd is running.
-x log_options
Ask the automounter to use the logging options specified in
log_options from now on. Note that the "fatal" and "error"
options cannot be turned off.
-D debug_options
Ask the automounter to use the debugging options specified in
debug_options from now on.
-H Display short usage message.
-P program_number
Contact an alternate running amd that had registered itself on a
different RPC program_number and apply all other operations to
that instance of the automounter. This is useful when you run
multiple copies of amd, and need to manage each one separately.
If not specified, amq will use the default program number for
amd, 300019. For security reasons, the only alternate program
numbers amd can use range from 300019 to 300029, inclusive.
-T Contact amd using the TCP transport only. Normally amq will try
TCP, and if that failed, will try UDP.
-U Contact amd using UDP (connectionless) transport only. Normally
amq will try TCP, and if that failed, will try UDP.
FILES
amq.x RPC protocol description.
CAVEATS
Amq uses a Sun registered RPC program number (300019 decimal) which may
not be in the /etc/rpc database.
If the TCP wrappers library is available, and the use_tcpwrappers
global amd.conf option is set to ``yes'', then amd will verify that the
host running amq is authorized to connect. The amd service name must
used in the /etc/hosts.allow and /etc/hosts.deny files. For example,
to allow only localhost to connect to amd, add this line to
/etc/hosts.allow:
amd: localhost
and this line to /etc/hosts.deny:
amd: ALL
SEE ALSO
amd(8), amd.conf(5), hosts_access(5). ``am-utils'' info(1) entry. Linux NFS and Automounter Administration by Erez Zadok, ISBN 0-7821-2739-8, (Sybex, 2001). http://www.am-utils.org Amd - The 4.4 BSD Automounter
AUTHORS
Jan-Simon Pendry <[email protected]>, Department of Computing, Imperial College, London, UK. Erez Zadok <[email protected]>, Computer Science Department, Stony Brook University, Stony Brook, New York, USA. Other authors and contributors to am-utils are listed in the AUTHORS file distributed with am-utils. 25 April 1989 AMQ(8)
Opportunity
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
Free Books
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Education
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.
