A system administrator has just installed the Advanced Intrusion Detection Environment (AIDE) on a new Linux server to monitor file integrity. After configuring /etc/aide.conf to meet site-specific requirements, the administrator needs to establish the initial baseline and then perform the first integrity verification. Which of the following command sequences correctly accomplishes this?
Run aide --update to generate the initial database, then run aide --check to verify its contents.
Run aide --check to find initial discrepancies, then run aide --init to create the baseline database.
Run aide --init to create the database, move the new database file to its operational location, then run aide --check.
Run the combined aide --init --check command to create the database and perform the verification in a single step.
The correct procedure is to first initialize the AIDE database using the aide --init command. This command scans the file system according to the rules in /etc/aide.conf and creates a new database file, typically named aide.db.new.gz, which serves as the initial snapshot or baseline. This new database file must then be moved or renamed to become the active database (e.g., mv /var/lib/aide/aide.db.new.gz /var/lib/aide/aide.db.gz). Once the baseline database is in place, the aide --check command is used to compare the current state of the file system against this database to detect any changes. Running aide --check before --init would fail because no database exists to check against. The aide --update command is used to create a new database from an existing one after legitimate changes have been made, not for the initial creation. The aide --init --check syntax is invalid as these actions must be performed in separate, distinct steps.
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What is the purpose of the AIDE tool?
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Why is it necessary to move the database file after running `aide --init`?
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