Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

syslog-ng(8)


NAME

   syslog-ng - syslog-ng system logger application

SYNOPSIS

   syslog-ng [options]

DESCRIPTION

   This manual page is only an abstract; for the complete documentation of
   syslog-ng, see The syslog-ng Open Source Edition Administrator Guide[1]
   or the official syslog-ng website[2].

   The syslog-ng OSE application is a flexible and highly scalable system
   logging application. Typically, syslog-ng is used to manage log
   messages and implement centralized logging, where the aim is to collect
   the log messages of several devices on a single, central log server.
   The different devices - called syslog-ng clients - all run syslog-ng,
   and collect the log messages from the various applications, files, and
   other sources. The clients send all important log messages to the
   remote syslog-ng server, where the server sorts and stores them.

OPTIONS

   --cfgfile <file> or -f <file>
       Use the specified configuration file.

   --chroot <dir> or -C <dir>
       Change root to the specified directory. The configuration file is
       read after chrooting so, the configuration file must be available
       within the chroot. That way it is also possible to reload the
       syslog-ng configuration after chrooting. However, note that the
       --user and --group options are resolved before chrooting.

   --debug or -d
       Start syslog-ng in debug mode.

   --default-modules
       A comma-separated list of the modules that are loaded
       automatically. Modules not loaded automatically can be loaded by
       including the @module <modulename> statement in the syslog-ng OSE
       configuration file. The following modules are loaded by default:
       affile, afprog, afsocket, afuser, basicfuncs, csvparser, dbparser,
       syslogformat, afsql. Available only in syslog-ng Open Source
       Edition 3.3 and later.

   --enable-core
       Enable syslog-ng to write core files in case of a crash to help
       support and debugging.

   --fd-limit <number>
       Set the minimal number of required file descriptors (fd-s); this
       sets how many files syslog-ng can keep open simultaneously. Default
       value: 4096. Note that this does not override the global ulimit
       setting of the host.

   --foreground or -F
       Do not daemonize, run in the foreground.

   --group <group> or -g <group>
       Switch to the specified group after initializing the configuration
       file.

   --help or -h
       Display a brief help message.

   --module-registry
       Display the list and description of the available modules. Note
       that not all of these modules are loaded automatically, only the
       ones specified in the --default-modules option. Available only in
       syslog-ng Open Source Edition 3.3 and later.

   --no-caps
       Run syslog-ng as root, without capability-support. This is the
       default behavior. On Linux, it is possible to run syslog-ng as
       non-root with capability-support if syslog-ng was compiled with the
       --enable-linux-caps option enabled. (Execute syslog-ng --version to
       display the list of enabled build parameters.)

   --persist-file <persist-file> or -R <persist-file>
       Set the path and name of the syslog-ng.persist file where the
       persistent options and data are stored.

   --pidfile <pidfile> or -p <pidfile>
       Set path to the PID file where the pid of the main process is
       stored.

   --control <ctlpath> or -c <ctlpath>
       Set syslog-ng control socket, default=/var/run/syslog-ng.ctl.

   --preprocess-into <output-file>
       After processing the configuration file and resolving included
       files and variables, write the resulting configuration into the
       specified output file. Available only in syslog-ng Open Source
       Edition 3.3 and later.

   --process-mode <mode>
       Sets how to run syslog-ng: in the foreground (mainly used for
       debugging), in the background as a daemon, or in safe-background
       mode. By default, syslog-ng runs in safe-background mode. This mode
       creates a supervisor process called supervising syslog-ng , that
       restarts syslog-ng if it crashes.

   --stderr or -e
       Log internal messages of syslog-ng to stderr. Mainly used for
       debugging purposes in conjunction with the --foreground option. If
       not specified, syslog-ng will log such messages to its internal
       source.

   --syntax-only or -s
       Verify that the configuration file is syntactically correct and
       exit.

   --user <user> or -u <user>
       Switch to the specified user after initializing the configuration
       file (and optionally chrooting). Note that it is not possible to
       reload the syslog-ng configuration if the specified user has no
       privilege to create the /dev/log file.

   --verbose or -v
       Enable verbose logging used to troubleshoot syslog-ng.

   --version or -V
       Display version number and compilation information, and also the
       list and short description of the available modules. For detailed
       description of the available modules, see the --module-registry
       option. Note that not all of these modules are loaded
       automatically, only the ones specified in the --default-modules
       option.

   --worker-threads
       Sets the number of worker threads syslog-ng OSE can use, including
       the main syslog-ng OSE thread. Note that certain operations in
       syslog-ng OSE can use threads that are not limited by this option.
       This setting has effect only when syslog-ng OSE is running in
       multithreaded mode. Available only in syslog-ng Open Source Edition
       3.3 and later. See The syslog-ng Open Source Edition 3.3
       Administrator Guide for details.

FILES

   /usr/

   /etc/syslog-ng/syslog-ng.conf

SEE ALSO

   syslog-ng.conf(5)

   The syslog-ng OSE 3.3 Administrator Guide[1]

   If you experience any problems or need help with syslog-ng, visit visit
   the syslog-ng wiki[3] or the syslog-ng mailing list[4].

   For news and notifications about of syslog-ng, visit the syslog-ng
   Insider Blog[5].

AUTHOR

   This manual page was written by the BalaBit Documentation Team
   <documentation@balabit.com>.

COPYRIGHT


   The authors grant permission to copy, distribute and/or modify this
   manual page under the terms of the GNU General Public License Version 2
   or newer (GPL v2+).

NOTES

    1. The syslog-ng Open Source Edition Administrator Guide
       http://www.balabit.com/support/documentation/

    2. the official syslog-ng website
       http://www.balabit.com/network-security/syslog-ng/

    3. visit the syslog-ng wiki
       http://www.balabit.com/wiki/syslog-ng-faq

    4. syslog-ng mailing list
       https://lists.balabit.hu/mailman/listinfo/syslog-ng

    5. syslog-ng Insider Blog
       http://insider.blogs.balabit.com



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.


birds banner