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Network Namespace

Linux kernal (v5.6) has 8 types of namespaces. Network namespace is one of the feature of linux kernal. Most container technologies use this feature to create isolated network stack in the operating system. We can create virtualized network stack with its interfaces, IP range, routing table etc. We can run application in different network stacks.

VETH devices are virtual ethernet devices. They can act as tunnels between network namespaces to create a bridge to a physical network device in another namespace, but can also be used as standalone network devices. The virtual ethernet device will act as a tunnel between the network namespaces that we will create.

We will go thorugh linux network namespace. We want to learn how two network namespace communicate with each other. Also we will see how a network namespace will communicate with outer world.

Our objectives:

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GROKKING NOTES

I liked the way Grokking the coding interview organized problems into learnable patterns. However, the course is expensive and the majority of the time the problems are copy-pasted from leetcode. As the explanations on leetcode are usually just as good, the course really boils down to being a glorified curated list of leetcode problems.

So below I made a list of leetcode problems that are as close to grokking problems as possible.

Pattern: Sliding Window

• https://leetcode.com/problems/maximum-subarray/ # Close enough
• https://leetcode.com/problems/minimum-size-subarray-sum/

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This is a sample of output

name	year	likes	rottenTomatoes_critics	rottenTomatoes_audience	imdb	download_link_720p	download_link_1080p	download_link_3d
Catch Me If You Can	2002	520	96%	89%	8.1	https://yts.ag/torrent/download/E1C033EB3F9A31539D1CA2E12ED80CE11A481A76	https://yts.ag/torrent/download/D77DCA4F05287BAB2994C237E2431DA5D7C7AFD3
Dallas Buyers Club	2013	606	93%	91%	8	https://yts.ag/torrent/download/F18A60DB02EC3B55C18924F47955DE766DACC537	ht

frfahim

How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv 

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First install fish shell on your system

sudo apt-get update
sudo apt-get install fish

Or install fish via ppa

sudo apt-add-repository ppa:fish-shell/release-2
sudo apt-get update

sudo apt-get install fish``