auditd man page on Oracle

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AUDITD(8)		System Administration Utilities		     AUDITD(8)

       auditd - The Linux Audit daemon

       auditd [-f] [-l] [-n] [-s disable|enable|nochange]

       auditd  is  the	userspace component to the Linux Auditing System. It's
       responsible for writing audit records to the disk. Viewing the logs  is
       done  with  the	ausearch  or aureport utilities. Configuring the audit
       rules is done with the auditctl utility. During startup, the  rules  in
       /etc/audit/audit.rules are read by auditctl and loaded into the kernel.
       Alterately, there is  also  an  augenrules  program  that  reads	 rules
       located	in  /etc/audit/rules.d/	 and compiles them into an audit.rules
       file. The audit daemon itself has some configuration options  that  the
       admin may wish to customize. They are found in the auditd.conf file.

       -f     leave the audit daemon in the foreground for debugging. Messages
	      also go to stderr rather than the audit log.

       -l     allow the audit daemon to follow symlinks for config files.

       -n     no fork. This is useful for running off of inittab or systemd.

	      specify when starting if auditd should change the current	 value
	      for  the	kernel enabled flag. Valid values for ENABLE_STATE are
	      "disable", "enable" or "nochange". The default is to enable (and
	      disable  when  auditd terminates). The value of the enabled flag
	      may be changed during the lifetime  of  auditd  using  'auditctl

       SIGHUP causes  auditd  to  reconfigure. This means that auditd re-reads
	      the configuration file. If there are no syntax errors,  it  will
	      proceed  to  implement the requested changes. If the reconfigure
	      is successful, a DAEMON_CONFIG event is recorded in the logs. If
	      not    successful,    error    handling	 is    controlled   by
	      space_left_action,  admin_space_left_action,   disk_full_action,
	      and disk_error_action parameters in auditd.conf.

	      caused  auditd  to  discontinue processing audit events, write a
	      shutdown audit event, and exit.

	      causes auditd to immediately rotate the logs.  It	 will  consult
	      the  max_log_size_action	to  see	 if it should keep the logs or

	      causes auditd to attempt to  resume  logging.  This  is  usually
	      needed after logging has been suspended.

       /etc/audit/auditd.conf - configuration file for audit daemon

       /etc/audit/audit.rules - audit rules to be loaded at startup

       /etc/audit/rules.d/  - directory holding individual sets of rules to be
       compiled into one file by augenrules.

       A boot param of audit=1 should be added to ensure  that	all  processes
       that  run  before the audit daemon starts is marked as auditable by the
       kernel. Not doing that will make a few processes impossible to properly

       The  audit daemon can receive audit events from other audit daemons via
       the audisp-remote audispd plugin. The audit daemon may be  linked  with
       tcp_wrappers  to	 control  which	 machines  can connect. If this is the
       case, you can add an entry to hosts.allow and deny.

       auditd.conf(5),	audispd(8),  ausearch(8),  aureport(8),	  auditctl(8),
       augenrules(8), audit.rules(7).

       Steve Grubb

Red Hat				   Sept 2013			     AUDITD(8)

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