→Investigation 3: What is a runlevel?
* <code>/etc/rc.d/init.d</code> is a directory of scripts.
In order to determine which of the startup scripts should be executed in each runlevel, the directory
** Note not all distributions use the same runlevel configurations. Debian and Ubuntu based distro's are different.
# To find out the value of the runlevel your GNU/Linux system goes into after boot, enter the command: <code>grep initdefault /etc/inittab</code>
== Investigation 4: What is the network configuration?
# To check the network configuration settings obtained from the DHCP server, run the following commands, describing the output in your log book:
#* ifconfig#* route#* netstat -rn#* nslookup (at the > prompt, enter the word "server" (do not type the quotes) and record the output. Type exit to leave nslookup).
# Find the following information in the output of the above commands:
#* MAC address (physical or hardware address) of the ethernet network interface
Answer the Investigation 4 question.
=== Investigation 5: How do You Secure the Grub Boot Loader? ===