auditd(8) — Linux manual page


AUDITD(8)              System Administration Utilities             AUDITD(8)

NAME         top

       auditd - The Linux Audit daemon

SYNOPSIS         top

       auditd [-f] [-l] [-n] [-s disable|enable|nochange] [-c <config_dir>]

DESCRIPTION         top

       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 system or loading 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. Alternately, 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.

OPTIONS         top

       -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 -e'.

       -c     Specify alternate config file directory. Note that this same
              directory will be passed to the dispatcher. (default:

SIGNALS         top

       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_file_action to see if it should keep the logs or

              causes auditd to attempt to resume logging and passing events
              to plugins. This is usually needed after logging has been
              suspended or the internal queue is overflowed. Either of these
              conditions depends on the applicable configuration settings.

              causes auditd to dump a report of internal state to

FILES         top

       /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.

       /etc/audit/plugins.d/ - directory holding individual plugin
       configuration files.

       /var/run/auditd.state - report about internal state.

NOTES         top

       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 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         top

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

AUTHOR         top

       Steve Grubb

COLOPHON         top

       This page is part of the audit (Linux Audit) project.  Information
       about the project can be found at 
       ⟨⟩.  If you have a bug report
       for this manual page, send it to  This page
       was obtained from the project's upstream Git repository
       ⟨⟩ on 2020-11-01.
       (At that time, the date of the most recent commit that was found in
       the repository was 2020-10-20.)  If you discover any rendering prob‐
       lems in this HTML version of the page, or you believe there is a bet‐
       ter or more up-to-date source for the page, or you have corrections
       or improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to

Red Hat                           Sept 2013                        AUDITD(8)

Pages that refer to this page: audit_request_status(3)audit_set_backlog_limit(3)audit_set_backlog_wait_time(3)audit_set_enabled(3)audit_set_failure(3)audit_set_pid(3)audit_set_rate_limit(3)get_auditfail_action(3)set_aumessage_mode(3)set_message_mode(3)auditd.conf(5)auditd-plugins(5)audit-plugins(5)zos-remote.conf(5)audit.rules(7)audispd-zos-remote(8)auditctl(8)augenrules(8)aureport(8)ausearch(8)pam_loginuid(8)systemd-update-utmp(8)systemd-update-utmp-runlevel.service(8)systemd-update-utmp.service(8)