Install aide-common by entering the following commands in the terminal:
sudo apt update sudo apt install aide-common
Advanced Intrusion Detection Environment - Common files
AIDE is an intrusion detection system that detects changes to files on the local system. It creates a database from the regular expression rules that it finds from the config file. Once this database is initialized it can be used to verify the integrity of the files. It has several message digest algorithms (md5, sha1, rmd160, tiger, haval, etc.) that are used to check the integrity of the file. More algorithms can be added with relative ease. All of the usual file attributes can also be checked for inconsistencies. . This package contains base and configuration files that are needed to run the actual binaries. . You will almost certainly want to tweak the configuration file in /etc/aide/aide.conf or drop your own config snippets into /etc/aide/aide.conf.d.