syslog-ng - logs system messages

syslog-ng [ -dFsvVy ] [ -f <config-filename> ] [ -p <pid-filename> ] [ -C <chroot-dir> ] [ -u <user> ] [ -g <group> ]

syslog-ng reads and logs messages to the system console, log files, other machines and/or users as specified by its configuration file.

The configuration file is read at startup and is reread after receipt of a hangup (HUP) signal. When reloading the configuration file, all destination files are closed and reopened as appropriate. For more information about the configuration file, see syslog-ng.conf(5).

Typically messages are sent to syslog-ng via a Unix domain socket (/dev/log) or via UDP, to port 514 or to whatever syslog/udp is defined to be in /etc/services. To receive messages from the kernel, /dev/klog is opened for reading.

Messages sent to syslog-ng should be an entire line, prefixed by a priority code in between '<' and '>'. Definititions of the recognised values can be found in the include file <sys/syslog.h>.

syslog-ng can be configured to pass messages on to other syslog-ng's and when doing so, it sends the message on with the priority as a prefix.

It is not necessary to terminate a message with a line feed or carriage return.

-C 0<directory>, --chroot=<directory>

Chroot to directory.

-d, --debug

Set "debug mode". Prints out various messages to aid in debugging and stops it from becoming a daemon.

-y, --yydebug

Enable debugging messages in the yacc parser, this option is only present if syslog-ng was compiled in debugging mode (--enable-debug configure option).

-F, --foreground

Don't fork into background.

-f 0<filename>, --cfgfile=<filename>

Instead of reading the normal /etc/syslog-ng/syslog-ng.conf file for configuration information, use the filename given instead.

-g 0<group>, --group=<group>

Switch to group.

-p 0<filename>, --pidfile=<filename>

Write the current PID information to the specified file. Defaults to /var/run/syslog-ng.pid.

-s, --syntax-only

Only read and parse the configuration file. See also the option -f.

-u 0<user>, --group=<user>

Switch to user.

-v, --verbose

Enable verbose mode. Prints out fewer messages, compared to -d.

-V, --version

Print the version number.

It is expected that syslog-ng will run as root, however, if not running on a priviledged port of it it owned its own log directories, etc, it might run as a non-root user.

syslog-ng.conf(5), logger(1), syslog(2), syslog(3), services(5), syslog.conf(5), klogd(8), syslogd(8), sysklogd(8)

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

Configuration file for syslog-ng. See syslog-ng.conf(5) for more information.

/var/run/syslog-ng.pid

The file containing the process id of syslog-ng.

If you find any, please send email to the syslog-ng mailing list at syslog-ng@lists.balabit.hu