1AUDITD(8)               System Administration Utilities              AUDITD(8)
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NAME

6       auditd - The Linux Audit daemon
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SYNOPSIS

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

12       auditd  is  the  userspace component to the Linux Auditing System. It's
13       responsible for writing audit records to the disk. Viewing the logs  is
14       done  with  the  ausearch  or aureport utilities. Configuring the audit
15       system or loading rules is  done  with  the  auditctl  utility.  During
16       startup,  the  rules in /etc/audit/audit.rules are read by auditctl and
17       loaded into the kernel. Alternately, there is also an  augenrules  pro‐
18       gram  that reads rules located in /etc/audit/rules.d/ and compiles them
19       into an audit.rules file. The audit daemon itself has  some  configura‐
20       tion  options  that  the admin may wish to customize. They are found in
21       the auditd.conf file.
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OPTIONS

24       -f     leave the audit daemon in the foreground for debugging. Messages
25              also go to stderr rather than the audit log.
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27       -l     allow the audit daemon to follow symlinks for config files.
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29       -n     no fork. This is useful for running off of inittab or systemd.
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31       -s=ENABLE_STATE
32              specify  when starting if auditd should change the current value
33              for the kernel enabled flag. Valid values for  ENABLE_STATE  are
34              "disable", "enable" or "nochange". The default is to enable (and
35              disable when auditd terminates). The value of the  enabled  flag
36              may  be  changed  during  the lifetime of auditd using 'auditctl
37              -e'.
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SIGNALS

40       SIGHUP causes auditd to reconfigure. This means  that  auditd  re-reads
41              the  configuration  file. If there are no syntax errors, it will
42              proceed to implement the requested changes. If  the  reconfigure
43              is successful, a DAEMON_CONFIG event is recorded in the logs. If
44              not   successful,    error    handling    is    controlled    by
45              space_left_action,   admin_space_left_action,  disk_full_action,
46              and disk_error_action parameters in auditd.conf.
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49       SIGTERM
50              caused auditd to discontinue processing audit  events,  write  a
51              shutdown audit event, and exit.
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54       SIGUSR1
55              causes  auditd  to  immediately rotate the logs. It will consult
56              the max_log_size_action to see if it should  keep  the  logs  or
57              not.
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60       SIGUSR2
61              causes  auditd  to  attempt  to  resume logging. This is usually
62              needed after logging has been suspended.
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FILES

66       /etc/audit/auditd.conf - configuration file for audit daemon
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68       /etc/audit/audit.rules - audit rules to be loaded at startup
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70       /etc/audit/rules.d/ - directory holding individual sets of rules to  be
71       compiled into one file by augenrules.
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NOTES

75       A  boot  param  of audit=1 should be added to ensure that all processes
76       that run before the audit daemon starts is marked as auditable  by  the
77       kernel. Not doing that will make a few processes impossible to properly
78       audit.
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80       The audit daemon can receive audit events from other audit daemons  via
81       the  audisp-remote  audispd plugin. The audit daemon may be linked with
82       tcp_wrappers to control which machines can  connect.  If  this  is  the
83       case, you can add an entry to hosts.allow and deny.
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SEE ALSO

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

92       Steve Grubb
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96Red Hat                            Sept 2013                         AUDITD(8)