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auditd

AUDITD(8)						  System Administration Utilities						 AUDITD(8)

NAME

       auditd - The Linux Audit daemon

SYNOPSIS

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

DESCRIPTION

       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. The audit daemon itself has some configuration options that the admin may wish to customize.
       They are found in the auditd.conf file.

OPTIONS

       -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

       -s=ENABLE_STATE
	      specify when starting if auditd should change the current value for the kernel enabled flag. Valid values for ENABLE_STATE are "dis-
	      able",  "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 -e'.

SIGNALS

       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 success-
	      ful, error handling is controlled by space_left_action, admin_space_left_action, disk_full_action, and disk_error_action	parameters
	      in auditd.conf.

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

       SIGUSR1
	      causes auditd to immediately rotate the logs. It will consult the max_log_size_action to see if it should keep the logs or not.

       SIGUSR2
	      causes auditd to attemp to resume logging. This is usually used after logging has been suspended.

FILES

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

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

NOTES

       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 audit.

       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.

SEE ALSO

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

AUTHOR

       Steve Grubb

Red Hat 							     Sept 2007								 AUDITD(8)

Red Hat