Advanced Intrusion Detection Environment (AIDE) is a utility that creates a database of files on the system, and then uses that database to ensure file integrity and detect system intrusions.
NOTE: In the default configuration, the *aide --init* command checks just a set of directories and files defined in the `/etc/aide.conf` file. To include additional directories or files in the AIDE database, and to change their watched parameters, edit `/etc/aide.conf` accordingly.
. To start using the database, remove the `.new` substring from the initial database file name:
. To change the location of the *AIDE* database, edit the `/etc/aide.conf` file and modify the `DBDIR` value. For additional security, store the database, configuration, and the `/usr/sbin/aide` binary file in a secure location such as a read-only media.
IMPORTANT: To avoid SELinux denials after the AIDE database location change, update your SELinux policy accordingly. See the link:https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/SELinux_Users_and_Administrators_Guide/[SELinux User's and Administrator's Guide] for more information.
At a minimum, *AIDE* should be configured to run a weekly scan. At most, *AIDE* should be run daily. For example, to schedule a daily execution of AIDE at _04:05_ a.m. using the *cron* command, see the xref:f{MAJOROSVER}@fedora:system-administrators-guide:monitoring-and-automation/Automating_System_Tasks.adoc[Automating System Tasks] chapter in the System Administrator's Guide.
The *aide --update* command creates the `/var/lib/aide/aide.db.new.gz` database file. To start using it for integrity checks, remove the `.new` substring from the file name.
== Additional Resources
For additional information on *AIDE*, see the following documentation:
- link:https://static.open-scap.org/ssg-guides/ssg-sl7-guide-ospp-rhel7-server.html#xccdf_org.ssgproject.content_group_aide[Guide to the Secure Configuration of Red Hat Enterprise Linux 7 (OpenSCAP Security Guide): Verify Integrity with AIDE]
