Mac For Unix Geeks

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Enter Mac OS X Panther for Unix Geeks by Brian Jepson and Ernest E. Rothman, two Unix geeks who found themselves in the same place you are. The new edition of this book is your guide to figuring out the BSD Unix system and Panther-specific components that you may find challenging. Mac OS X for Unix Geeks serves as a bridge between Apple's Darwin OS and the more traditional Unix systems. This clear, concise guide gives you a tour of Mac OS X's Unix shell in both Leopard and Tiger, and helps you find the facilities that replace or correspond to standard Unix utilities.

Mac For Unix Geeks

In order to communicate or transfer the data from one computer to another computer we need some address. In Computer Network various types of address are introduced; each works at different layer. Media Access Control Address is a physical address which works at Data Link Layer. In this article, we will discuss about addressing in DLL, which is MAC Address.

For

Media Access Control (MAC) Address –

MAC Addresses are unique 48-bits hardware number of a computer, which is embedded into network card (known as Network Interface Card) during the time of manufacturing. MAC Address is also known as Physical Address of a network device. In IEEE 802 standard, Data Link Layer is divided into two sublayers –

  1. Logical Link Control(LLC) Sublayer
  2. Media Access Control(MAC) Sublayer

MAC address is used by Media Access Control (MAC) sublayer of placeholder='Add your personal notes here! (max 5000 chars)'>

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Nmap is Linux command-line tool for network exploration and security auditing. This tool is generally used by hackers and cybersecurity enthusiasts and even by network and system administrators. It is used for the following purposes:

  • Real time information of a network
  • Detailed information of all the IPs activated on your network
  • Number of ports open in a network
  • Provide the list of live hosts
  • Port, OS and Host scaning

Installing Nmap Command

In case of Debian/Ubuntu

In case of CentOS/RedHat

Working with Nmap Command

1. To scan a System with Hostname and IP address. First, Scan using Hostname


Now let’s Scan using IP Address

The nmap command allows scanning a system in various ways. In this we are performing a scan using the hostname as “geeksforgeeks” and IP address “172.217.27.174”, to find all open ports, services, and MAC addresses on the system.

2. To scan using “-v” option.

Mac for unix geeks software

It is used to get more detailed information about remote machine.

3. To scan multile hosts



Unix

We can scan multiple hosts by writing IP addresses or hostnames with nmap.

4. To scan whole subnet

We can scan a whole subnet or IP range with nmap by providing “*” with it. It will scan a whole subnet and give the information about those hosts which are Up in the Network.

5. To scan to detect firewall settings.

Detecting firewall settings can be useful during penetration testing and vulnerability scans. To detect it we use “-sA” option. This will provide you with information about firewall being active on the host. It uses an ACK scan to receive the information.

6. To identify Hostnames

We use “sL” option to find hostnames for the given host by completing a DNS query for each one. In addition to this “-n” command can be used to skip DNS resolution, while the “-R” command can be used to always resolve DNS.

Mac for unix geeks download

7. To scan from a file

If we have a long list of addresses that we need to scan, we can directly import a file through the command line. It will produce a scan for the given IP addresses.

8. To get some help

We use the “-h” option if we have any questions about nmap or any of the given commands. It shows the help section for nmap command, including giving information regarding the available flags.

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Mac For Unix Geeks Command