syslogd(8)
NAME
syslogd - log systems messages
SYNOPSIS
syslogd [-V] [-a socket] [-d] [-f config_file] [-h] [-l host_list]
[-m mark_interval] [-n] [-p log_socket] [-r] [-s domain_list]
[--no-klog] [--no-unixaf] [--no-forward]
DESCRIPTION
Syslogd reads and logs messages to the system console, log files, other
machines and/or users as specified by its configuration file. The
options are as follows:
-V Print version number and exit.
--help Display help information and exit.
- -d Enter debug mode. syslogd does not put itself in the background,
- does not fork and shows debug information.
- -a Specify additional sockets from that syslogd has to listen to.
- This is needed if you are going to let some daemon run within a
chroot()'ed environment. You can specify up to 19 additional
sockets. - -f, --rcfile=FILE
- Specify the pathname of an alternate configuration file; the
default is system specific and displayed in the help output. - --rcdir=DIR
- Specify the pathname of an alternate configuration directory; the default is system specific and displayed in the help output.
- -h, --hop
- Enable forwarding remote messages. By default syslogd will not
forward messages it receives from remote hosts. - -l A colon-seperated lists of hosts which should be considered
- local; they are logged by their hostnames instead by their FQDN.
- -m, --mark=INTERVAL/fP
- Select the number of minutes between ``mark'' messages; the
default is 20 minutes. Setting it to 0 disables timestamps. - -n, --no-detach
- Suppress backgrounding and detachment of the daemon from its controlling terminal.
- -p, --socket=PATH
- Specify the pathname of an alternate log socket. The default is systemspecific and displayed in the help output.
- -r, --inet
- Enable to receive remote messages using an internet domain
socket. The default is to not receive any messages from the network. Older version always accepted remote messages. - -s A colon-seperated list of domainnames which should be stripped
- from the FQDNs of hosts when logging.
- --no-klog
- Do not listen to the kernel log device. This is only supported on
systems which define a kernel log device, on all others this is
already the default, and the option will be silently ignored. - --no-unixaf
- Do not listen to any unix domain socket. This option overrides -p and -a.
- --no-forward
- Do not forward any messages. This overrides -h.
- Syslogd reads its configuration file when it starts up and whenever it receives a hangup signal. For information on the format of the configuration file, see syslog.conf(5).
- Syslogd reads messages from the UNIX domain socket /dev/log, from an Internet domain socket specified in /etc/services, and from the one of the special devices /dev/klog or /proc/kmsg depending on the system (to read kernel messages). In a GNU/Linux system it will not parse the System.map and use it to annotate the kernel messages.
- Syslogd creates the file /var/run/syslog.pid, and stores its process id there. This can be used to kill or reconfigure syslogd.
- The message sent to syslogd should consist of a single line. The message
can contain a priority code, which should be a preceding decimal number
in angle braces, for example, '<5.>' This priority code should map into
the priorities defined in the include file <sys/syslog.h>.
FILES
- /etc/syslog.conf The configuration file.
/var/run/syslog.pid The process id of current syslogd.
/dev/log Name of the UNIX domain datagram log socket.
/dev/klog, /proc/kmsg - The kernel log device.
SEE ALSO
logger(1), syslog(3), services(5), syslog.conf(5)
HISTORY
- The syslogd command appeared in 4.3BSD.