Red Hat

cd /etc/logrotate.d
# vi audit
/var/log/audit/audit.log {
weekly
rotate 24
compress
sharedscripts
postrotate
/etc/init.d/auditd reload
endscript
}

RHEL
# cp -p /etc/audit/auditd.conf /etc/audit/auditd.conf.YYYYMMDD

SLES
# cp -p /etc/auditd.conf /etc/auditd.conf.YYYYMMDD

# vi auditd.conf
#
# This file controls the configuration of the audit daemon
#
log_file = /var/log/audit/audit.log
log_format = RAW
log_group = root
priority_boost = 4
3
flush = INCREMENTAL
freq = 20
num_logs = 24-----------------increase log number from 4 to 24
disp_qos = lossy
dispatcher = /sbin/audispd
name_format = NONE
##name = mydomain
max_log_file = 5---------------------leave log file size to 5M
max_log_file_action------------------rotate old logs
space_left = 75
space_left_action = SYSLOG
action_mail_acct = root
admin_space_left = 50
admin_space_left_action = SUSPEND
disk_full_action = SUSPEND
disk_error_action = SUSPEND
##tcp_listen_port =
tcp_listen_queue = 5
tcp_max_per_addr = 1
##tcp_client_ports = 1024-65535
tcp_client_max_idle = 0
enable_krb5 = no
krb5_principal = auditd
##krb5_key_file = /etc/audit/audit.key

RHEL & SLES
# /etc/init.d/auditd restart