• AppArmor Ubuntu 16.04
• Apparmor File Permission Access Modes
• Безопасный Linux : Часть первая. AppArmor – песочница для приложений

• В Debian 10 включен по умолчанию
• debian AppArmor HowToUse
• ubuntu AppArmor

# mkdir /etc/default/grub.d

# cat /etc/default/grub.d/apparmor.cfg

GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT apparmor=1 security=apparmor"

# cat /etc/default/grub

...
GRUB_CMDLINE_LINUX="... apparmor=0"
...

# update-grub

# init 6

# apt install apparmor

# aa-status

# ps axZ      # apt install clamav-daemon

# find /etc/apparmor.d/

# cat /etc/apparmor.d/usr.sbin.clamd

...
  /disk2/ rw,
  /disk2/** krw,
  
  /var/CommuniGate/ rw,
  /var/CommuniGate/** krw,
...

# cat /etc/apparmor.d/local/usr.sbin.dhcpd

  /**/dhcp/ r,
  /**/dhcp/** r,

# init 6

# apt install apparmor-utils

# aa-unconfined

# apt install apparmor-profiles

# less /usr/share/apparmor/extra-profiles/README

# find /etc/apparmor.d/

# ldd /bin/bash

# ldd /bin/cat

# ldd /usr/bin/file

# man file

# cat /etc/apparmor.d/usr.local.sbin.webd

/usr/local/sbin/webd {

  network inet stream,

  /usr/local/sbin/webd r,
#  /usr/bin/bash ix,
  /usr/bin/cat ix,
  /usr/bin/file ix,
  /etc/magic r,
  /usr/share/file/magic.mgc r,
  /usr/lib/file/magic.mgc r,

  /var/www/** r,

  /usr/lib/x86_64-linux-gnu/libtinfo* mr,
  /usr/lib/x86_64-linux-gnu/libdl* mr,
  /usr/lib/x86_64-linux-gnu/libc* mr,
  /usr/lib/x86_64-linux-gnu/libz* mr,
  /usr/lib/x86_64-linux-gnu/libmagic* mr,

}

# aa-complain /usr/local/sbin/webd

# aa-status

# tail -f /var/log/audit/audit.log | grep usr.local.sbin.webd

# aa-enforce /usr/local/sbin/webd

# tail -f /var/log/audit/audit.log | grep usr.local.sbin.webd

# aa-disable /usr/local/sbin/webd

• Profiling with tools

# aa-genprof /usr/local/sbin/webd
...
#https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=928160
debian10# touch /etc/apparmor.d/local/...dovecot...
...

# cat /etc/apparmor.d/usr.local.sbin.webd
...
  /var/www/* r,
}

# service apparmor restart