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syslog.conf(5)

syslog.conf(5)                   File Formats                   syslog.conf(5)



NAME
       syslog.conf - configuration file for syslogd system log daemon

SYNOPSIS
       /etc/syslog.conf

DESCRIPTION
       The  file  /etc/syslog.conf contains information used by the system log
       daemon, syslogd(8), to forward a  system  message  to  appropriate  log
       files  and/or  users.  syslogd  preprocesses this file through m4(1) to
       obtain the correct information for certain log files, defining  LOGHOST
       if  the  address  of loghost is the same as one of the addresses of the
       host that is running syslogd.


       A configuration entry is composed of two TAB-separated fields:

         selector       action



       The selector field contains  a  semicolon-separated  list  of  priority
       specifications of the form:

         facility.level [ ; facility.level ]



       where facility is a system facility, or comma-separated list of facili‐
       ties, and level is an indication of the severity of the condition being
       logged. Recognized values for facility include:

       user        Messages  generated  by user processes. This is the default
                   priority for  messages  from  programs  or  facilities  not
                   listed in this file.


       kern        Messages generated by the kernel.


       mail        The mail system.


       daemon      System daemons.


       auth        The  authorization system: login(1), su(8), getty(8), among
                   others.


       lpr         The line printer spooling system.


       news        Designated for the USENET network news system.


       uucp        Designated for the UUCP system; it does not  currently  use
                   the syslog mechanism.


       cron        Designated  for  cron/at messages generated by systems that
                   do logging through  syslog.  The  current  version  of  the
                   Solaris  operating  system  does  not use this facility for
                   logging.


       audit       Designated for audit messages  generated  by  systems  that
                   audit by means of syslog.


       local0-7    Designated for local use.


       mark        For timestamp messages produced internally by syslogd.


       *           An  asterisk  indicates  all facilities except for the mark
                   facility.



       Recognized values for level are (in descending order of severity):

       emerg      For panic conditions that would normally be broadcast to all
                  users.


       alert      For conditions that should be corrected immediately, such as
                  a corrupted system database.


       crit       For warnings about critical conditions, such as hard  device
                  errors.


       err        For other errors.


       warning    For warning messages.


       notice     For  conditions  that  are  not  error  conditions,  but may
                  require special handling. A configuration entry with a level
                  value of notice must appear on a separate line.


       info       Informational messages.


       debug      For  messages  that  are normally used only when debugging a
                  program.


       none       Do not send messages from  the  indicated  facility  to  the
                  selected file. For example, a selector of

                  *.debug;mail.none

                  sends  all  messages  except  mail  messages to the selected
                  file.



       For a given facility and level, syslogd matches all messages  for  that
       level  and  all  higher  levels. For example, an entry that specifies a
       level of crit also logs messages at the alert and emerg levels.


       The action field indicates where to forward  the  message.  Values  for
       this field can have one of four forms:

           o      A  filename, beginning with a leading slash, which indicates
                  that messages specified by the selector are to be written to
                  the  specified file. The file is opened in append mode if it
                  exists. If the file does not exist, logging  silently  fails
                  for this action.


           o      The  name  of  a  remote  host, prefixed with an @, as with:
                  @server, which indicates  that  messages  specified  by  the
                  selector  are  to  be  forwarded to the syslogd on the named
                  host. The hostname loghost is treated, in the  default  sys‐
                  log.conf,  as  the  hostname  given to the machine that logs
                  syslogd messages. Every machine is loghost by  default,  per
                  the  hosts  database.  It  is  also  possible to specify one
                  machine on a network to be loghost by, literally, naming the
                  machine  loghost.  If  the local machine is designated to be
                  loghost, then syslogd messages are written to the  appropri‐
                  ate  files.  Otherwise, they are sent to the machine loghost
                  on the network.


           o      The name of a remote host, prefixed  with  an  !,  as  with:
                  !server.  This is rsyslog compatible forwarding, which indi‐
                  cates that messages specified by the selector are to be for‐
                  warded  to  rsyslogd  on the named host. This option behaves
                  similarly to @. The only difference is  that  the  forwarded
                  messages include current hostname.


           o      A  comma-separated  list  of usernames, which indicates that
                  messages specified by the selector are to be written to  the
                  named users if they are logged in.


           o      An  asterisk, which indicates that messages specified by the
                  selector are to be written to all logged-in users.



       Blank lines are ignored. Lines for which the first  nonwhite  character
       is a '#' are treated as comments.

EXAMPLES
       Example 1 A Sample Configuration File



       With the following configuration file:



       tab();        lw(2.75i)        lw(2.75i)        *.notice/var/log/notice
       mail.info/var/log/notice                        *.crit/var/log/critical
       kern,mark.debug/dev/console kern.err@server *.emerg* *.alertroot,opera‐
       tor *.alert;auth.warning/var/log/auth




       syslogd(8) logs all mail system messages except debug messages and  all
       notice  (or higher) messages into a file named /var/log/notice. It logs
       all critical messages into /var/log/critical, and all  kernel  messages
       and 20-minute marks onto the system console.



       Kernel  messages of err (error) severity or higher are forwarded to the
       machine named server. Emergency messages are forwarded  to  all  users.
       The  users  root  and  operator are informed of any alert messages. All
       messages from the authorization system of warning level or  higher  are
       logged in the file /var/log/auth.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _ Interface StabilityCommitted


SEE ALSO
       at(1), crontab(1), logger(1), login(1),  m4(1),  syslog(3C),  hosts(5),
       attributes(7), cron(8), getty(8), su(8), syslogd(8)



Oracle Solaris 11.4               11 Dec 2020                   syslog.conf(5)
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