May I know why we have them linked ? is there any reason behind this ?lrwxrwxrwx.  1 root root    7 Aug  7  2015 rc -> rc.d/rclrwxrwxrwx.  1 root root   15 Aug  7  2015 rc.sysinit -> rc.d/rc.sysinitlrwxrwxrwx.  1 root root   13 Aug  7  2015 rc.local -> rc.d/rc.locallrwxrwxrwx.  1 root root   10 Aug  7  2015 rc1.d -> rc.d/rc1.dlrwxrwxrwx.  1 root root   10 Aug  7  2015 rc0.d -> rc.d/rc0.dlrwxrwxrwx.  1 root root   10 Aug  7  2015 rc4.d -> rc.d/rc4.dlrwxrwxrwx.  1 root root   10 Aug  7  2015 rc3.d -> rc.d/rc3.dlrwxrwxrwx.  1 root root   10 Aug  7  2015 rc2.d -> rc.d/rc2.dlrwxrwxrwx.  1 root root   10 Aug  7  2015 rc6.d -> rc.d/rc6.dlrwxrwxrwx.  1 root root   10 Aug  7  2015 rc5.d -> rc.d/rc5.d
why rc and rc.x are linked
linux;rc