list of instaaled software

All actions with apt (apt-get) are logged. These files are available in /var/log/apt/. To view the most recent history log, execute: less /var/log/apt/history.log These logs gets rotated (every month I guess), old files will be suffixed with a number and compressed. So to view the next history log, use: zless /var/log/apt/history.log.1.gz To view the logs available: ls -la /var/log/apt/