Linux: Start / Stop / Restart Apparmor

Author: Vivek Gite Last updated: April 9, 2013 1 comment

AppArmor is a Linux Security Module (LSM) implementation of name-based mandatory access controls (MAC). How do I start / stop / restart AppArmor under Ubuntu Linux or OpenSuse / Suse Enterprise Linux server systems running on IBM hardware?

AppArmor is an effective and easy-to-use Linux application security system. AppArmor protects the Linux operating system and applications from external or internal threats, even zero-day attacks, by enforcing good behavior and preventing even unknown application flaws from being exploited.

Tutorial details
Difficulty	Easy (rss)
Root privileges	Yes
Requirements	Suse/Ubuntu/Debian
Time	N/A

AppArmor security policies completely define what system resources individual applications can access, and with what privileges. You need to use the following init.d scripts to control AppArmor:

Task: Stop Apparmor

Type the following command:

## debian/ubuntu 
sudo /etc/init.d/apparmor stop
 
## Suse
/etc/init.d/boot.apparmor stop

Task: Start Apparmor

Type the following command:

## debian/ubuntu 
sudo /etc/init.d/apparmor start
 
## Suse
/etc/init.d/boot.apparmor start

Task: Restart Apparmor

Type the following command:

## debian/ubuntu 
sudo /etc/init.d/apparmor restart
 
## Suse
/etc/init.d/boot.apparmor restart

Task: See the current Apparmor status

Type the following command:

## debian/ubuntu 
sudo /etc/init.d/apparmor status
 
## Suse
/etc/init.d/boot.apparmor status

Sample outputs:

apparmor module is loaded.
17 profiles are loaded.
17 profiles are in enforce mode.
   /bin/ping
   /sbin/klogd
   /sbin/syslog-ng
   /sbin/syslogd
   /usr/lib/PolicyKit/polkit-explicit-grant-helper
   /usr/lib/PolicyKit/polkit-grant-helper
   /usr/lib/PolicyKit/polkit-grant-helper-pam
   /usr/lib/PolicyKit/polkit-read-auth-helper
   /usr/lib/PolicyKit/polkit-resolve-exe-helper
   /usr/lib/PolicyKit/polkit-revoke-helper
   /usr/lib/PolicyKit/polkitd
   /usr/sbin/avahi-daemon
   /usr/sbin/identd
   /usr/sbin/mdnsd
   /usr/sbin/nscd
   /usr/sbin/ntpd
   /usr/sbin/traceroute
0 profiles are in complain mode.
3 processes have profiles defined.
3 processes are in enforce mode :
   /sbin/klogd (812) 
   /sbin/syslog-ng (809) 
   /usr/sbin/nscd (6229) 
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.

References:

Apparmor help wiki.
Apparmor from the Ubuntu wiki.

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