Lynis

00 03 * * 7 sudo /home/ractive/lynis/lynis audit system --cronjob
00 04 * * 7 mutt -s "Sserver Lynis Report" ractive74@gmail.com < /var/log/lynis-report.dat

for a rpi setup: https://ownyourbits.com/2017/12/23/security-audit-your-arm-board-with-lynis/

sudo wget -O - https://packages.cisofy.com/keys/cisofy-software-public.key | sudo apt-key add -

echo "deb https://packages.cisofy.com/community/lynis/deb/ stable main" | sudo tee /etc/apt/sources.list.d/cisofy-lynis.list

sudo apt install lynis

sudo lynis show version

after creating custom profile for raspberry pi

sudo lynis audit system --profile custom.prf

to dump the output into a text file:

sudo lynis audit system --no-colors --profile custom.prf > lynisreport.txt

references: https://packages.cisofy.com/community/#debian-ubuntu