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We’ve established how easy it is to make Ubuntu look like a Mac but theming Linux Mint, the popular Ubuntu-based offshoot, is a little trickier.

But no more.

It’s now possible to make Linux Mint look like a Mac too, and it’s all thanks to a customised version of the uncannily accurate macOS Mojave GTK theme we highlighted a few weeks ago.

So if you long to add some Cupertino styling to the Cinnamon desktop, read on!

Mac Theme for Linux Mint 19

Mac themes for Linux Mint are not new.

But good ones? Well, they have been a bit hard to come by due, in part, to the Cinnamon desktop being based around an older version of GTK, the underlying toolkit that’s used to “draw” the GUI of many apps.

Major compatibility issues and refactoring changes between GTK versions has meant that many popular modern GTK themes were not directly compatible with Linux Mint — and that included crop of clonetastic Mac themes too.

Updated GTK in Linux Mint 19

The recent release of Linux Mint 19 changes the game; ‘Tara’ ships with a newer version of GTK that supports many of the advanced theming capabilities that themes often use.

And ready to take full advantage of the new theming capabilities available to Linux Mint 19 is prolific Linux theme maker PaulXfce.

Paul creates and maintains a bunch of well designed and well made themes for various GTK+ based desktop environments, including GNOME Shell, Budgie and, more relevant to those of you reading this post, Cinnamon.

Having recently raved about his creepily accurate macOS Mojave theme I was thrilled to learn that Paul has made a custom version of his macOS mojave theme available for the Cinnamon desktop.

Not that the task was entirely smooth sailing, as Paul points out:

“This has proven to be a much more difficult thing to do, because of the way Linux Mint uses Muffin as a window-manager, which has some drawbacks (like: Server-Side-Decoration, so no transparency in Nemo, ) and the ‘multitude’ of toolbars that take half the real-estate of the window… Reducing the size of them was my first priority.”

Undeterred, Paul has re-engineered his Mac os theme for Linux Mint, building a new Metacity theme that blends with the rest of the UI while still allowing apps using Client Side Decoration (CSD) to look the part too.

The downside is that, for now, Paul’s excellent Mac os theme only affects the look and feel of applications and app window borders. A Cinnamon desktop theme is not (currently) available (and the Cinnamon Spices website turns up nothing Apple-related).

Still; the theme is a sterling attempt and well worth trying out — even if only as a novelty. You can download the theme directly from GNOME-Look:

To install, extract the archive file to the hidden ‘.themes’ folder in your Home folder (if you don’t have one, create one).

Finally, to apply the theme, Open System Settings > Appearance > Themes and select the theme in both the window-borders and controls section.

More Ways to Make Linux Mint Look like a Mac

If you’re minded to make the Mint desktop more like Mac OS X there are some additional things you can do to curate a Cupertino-style aesthetic on the Cinnamon desktop.

You can move Mint desktop panels easily. Just right-click on an empty section of the panel, choose the ‘Properties’ menu option and, from the settings you see, move the panel from the bottom of the screen to the top.

This makes way for what is surely the most iconic element of the Mac desktop: the dock.

A chunky task bar, the dock puts large app icons and folder shortcuts within reach at the bottom of the screen. There are plenty of Linux docks available but we think that Plank is by far and away the best. You can install Plank on Linux Mint be searching for it in the Software Manager app.

You can add more applications to your Plank dock by dragging a shortcut out of the Mint Menu and dropping it on to the dock. You can even add folders to Plank too!

Other suggestions:

• Change the desktop wallpaper to a Mac background
• Replace the bottom panel with a dock app like Plank
• Install a Mac icon theme for Linux
• Move the bottom panel to the top of the screen
• Install/enable Nemo Preview, analogous to Quick Look
• Install Synapse, Kupfer, Alfred or similar for a Spotlight equivalent

So get started and share your screenshots in the comments.

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• Selected Reading

Address Resolution Protocol (ARP) is a stateless protocol used for resolving IP addresses to machine MAC addresses. All network devices that need to communicate on the network broadcast ARP queries in the system to find out other machines’ MAC addresses. ARP Poisoning is also known as ARP Spoofing.

Here is how ARP works −

• When one machine needs to communicate with another, it looks up its ARP table.

• If the MAC address is not found in the table, the ARP_request is broadcasted over the network.

• All machines on the network will compare this IP address to MAC address.

• If one of the machines in the network identifies this address, then it will respond to the ARP_request with its IP and MAC address.

• The requesting computer will store the address pair in its ARP table and communication will take place.

What is ARP Spoofing?

ARP packets can be forged to send data to the attacker’s machine.

• ARP spoofing constructs a large number of forged ARP request and reply packets to overload the switch.

• The switch is set in forwarding mode and after the ARP table is flooded with spoofed ARP responses, the attackers can sniff all network packets.

Attackers flood a target computer ARP cache with forged entries, which is also known as poisoning. ARP poisoning uses Man-in-the-Middle access to poison the network.

What is MITM?

The Man-in-the-Middle attack (abbreviated MITM, MitM, MIM, MiM, MITMA) implies an active attack where the adversary impersonates the user by creating a connection between the victims and sends messages between them. In this case, the victims think that they are communicating with each other, but in reality, the malicious actor controls the communication.

A third person exists to control and monitor the traffic of communication between two parties. Some protocols such as SSL serve to prevent this type of attack.

ARP Poisoning − Exercise

In this exercise, we have used BetterCAP to perform ARP poisoning in LAN environment using VMware workstation in which we have installed Kali Linux and Ettercap tool to sniff the local traffic in LAN.

For this exercise, you would need the following tools −

• VMware workstation
• Kali Linux or Linux Operating system
• Ettercap Tool
• LAN connection

Note − This attack is possible in wired and wireless networks. You can perform this attack in local LAN. Planner 5d interior design.

Step 1 − Install the VMware workstation and install the Kali Linux operating system.

Step 2 − Login into the Kali Linux using username pass “root, toor”.

Step 3 − Make sure you are connected to local LAN and check the IP address by typing the command ifconfig in the terminal.

Step 4 − Open up the terminal and type “Ettercap –G” to start the graphical version of Ettercap.

Step 5 − Now click the tab “sniff” in the menu bar and select “unified sniffing” and click OK to select the interface. We are going to use “eth0” which means Ethernet connection.

Step 6 − Now click the “hosts” tab in the menu bar and click “scan for hosts”. It will start scanning the whole network for the alive hosts.

Step 7 − Next, click the “hosts” tab and select “hosts list” to see the number of hosts available in the network. This list also includes the default gateway address. We have to be careful when we select the targets.

Step 8 − Now we have to choose the targets. In MITM, our target is the host machine, and the route will be the router address to forward the traffic. In an MITM attack, the attacker intercepts the network and sniffs the packets. So, we will add the victim as “target 1” and the router address as “target 2.”

In VMware environment, the default gateway will always end with “2” because “1” is assigned to the physical machine.

Step 9 − In this scenario, our target is “192.168.121.129” and the router is “192.168.121.2”. So we will add target 1 as victim IP and target 2 as router IP.

Step 10 − Now click on “MITM” and click “ARP poisoning”. Thereafter, check the option “Sniff remote connections” and click OK.

Step 11 − Click “start” and select “start sniffing”. This will start ARP poisoning in the network which means we have enabled our network card in “promiscuous mode” and now the local traffic can be sniffed.

Note − We have allowed only HTTP sniffing with Ettercap, so don’t expect HTTPS packets to be sniffed with this process.

Step D: Do Find/Replace. I like to select Command (or Control for PC) + F, then select the “Replace” button. Type in #N/A in the Find box and leave the Replace box empty. Select “Replace All” Now you have cleaned up data and you can run calculations or create charts with it. Hlookup example.

Step 12 − Now it’s time to see the results; if our victim logged into some websites. You can see the results in the toolbar of Ettercap.

This is how sniffing works. You must have understood how easy it is to get the HTTP credentials just by enabling ARP poisoning.

ARP Poisoning has the potential to cause huge losses in company environments. This is the place where ethical hackers are appointed to secure the networks.

Like ARP poisoning, there are other attacks such as MAC flooding, MAC spoofing, DNS poisoning, ICMP poisoning, etc. that can cause significant loss to a network.

In the next chapter, we will discuss another type of attack known as DNS poisoning.