Cloud Computing Standards and Security - Deploying and Managing a Cloud Infrastructure - page 342

rc.d rc.d is a utility that is used to automate the boot process. A user can activate or deac-
tivate a port and its associated server process by commenting out lines from the configura-
tion files. Furthermore, /etc/rc*.d directories can be found on host systems (where * is any
number from 0 to 6, each denoting a run level). These directories contain symbolic links
(symlinks) to server startup scripts. Deleting a symlink will prevent the rc.d utility from
starting that server process. The following shows the output of listing rc*.d directories.
$ ls -lh /etc/rc*.d
/etc/rc0.d:
total 4.0K
lrwxrwxrwx 1 root root 17 Mar 7 2013 K08tomcat7 -> ../init.d/tomcat7
lrwxrwxrwx 1 root root 17 Nov 28 2012 K09apache2 -> ../init.d/apache2
..
/etc/rc1.d:
total 4.0K
lrwxrwxrwx 1 root root 17 Mar 7 2013 K08tomcat7 -> ../init.d/tomcat7
lrwxrwxrwx 1 root root 17 Nov 28 2012 K09apache2 -> ../init.d/apache2
lrwxrwxrwx 1 root root 17 Jan 15 2013 K20jenkins -> ../init.d/jenkins
..
/etc/rc2.d:
total 4.0K
-rw-r--r-- 1 root root 677 Jul 26 2012 README
lrwxrwxrwx 1 root root 15 Nov 28 2012 S15bind9 -> ../init.d/bind9
lrwxrwxrwx 1 root root 20 Nov 28 2012 S20apt-cacher -> ../init.d/apt-cacher
..
/etc/rc3.d:
total 4.0K
-rw-r--r-- 1 root root 677 Jul 26 2012 README
lrwxrwxrwx 1 root root 15 Nov 28 2012 S15bind9 -> ../init.d/bind9
lrwxrwxrwx 1 root root 20 Nov 28 2012 S20apt-cacher -> ../init.d/apt-cacher
..
/etc/rc4.d:
total 4.0K
-rw-r--r-- 1 root root 677 Jul 26 2012 README
lrwxrwxrwx 1 root root 15 Nov 28 2012 S15bind9 -> ../init.d/bind9
lrwxrwxrwx 1 root root 20 Nov 28 2012 S20apt-cacher -> ../init.d/apt-cacher
lrwxrwxrwx 1 root root 17 Nov 26 2013 S20foreman -> ../init.d/foreman
..