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Rakesh Jain Profile picture
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22 Oct, 10 tweets, 3 min read
What is Kubernetes and How it works!

A Short Thread πŸ‘‡πŸ‘‡ Image
Use case ->

You have created an application and want to share it with the world. Image
Docker comes into the picture to package the application. Image
And your application starts getting massive traffic. Image
Time to scale up. Image
When things are out of control. Image
There comes Kubernetes as a savior. Image
How it works! Image
Kubernetes Architecture. Image
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More from @devops_tech

Rakesh Jain Profile picture
25 Oct
Cyber Security Basics!

#infosec

A Mega Thread πŸ‘‡ PC: cyberoregon
What is Cyber Security?

Cybersecurity is a way of protecting the network, computers, and other electronic gadgets from cybercriminals. The Malicious attackers might delete, modify or leak confidential information posing a huge threat to a business or an individual. PC: abacustechnologies
What is Cyber Crime?

Here are some examples of Cyber Crime:

1. Identity Theft

2. Online Predators

3. BEC ("Business Email Compromise")

4. Ransomware

4. Stealing of sensitive intellectual property
Read 33 tweets
Rakesh Jain Profile picture
18 Oct
Securing Linux Servers!

Everything about Iptables - The Linux Firewall.

#infosec

A Mega Thread πŸ‘‡
Iptables is a command-line firewall utility for Linux. It monitors traffic from & to ur server using tables.
These tables contain sets of rules, called chains, that will filter incoming & outgoing data packets. PC: linuxkamarada
When someone tries to establish connection to and from your system iptables immediately looks for a rule in its list to match it and If it doesn’t find a matching one, it resorts to the default action (either DROP or Accept).
Read 45 tweets
Rakesh Jain Profile picture
13 Oct
Copying files and directories remotely.

Keeping Linux files and directories in sync.

Everything about "rsync"

A Thread πŸ‘‡
What Is Rsync?

Rsync, or Remote Sync, is a fast, versatile and free command-line tool that lets you transfer and sync files and directories to local and remote destinations in an efficient and secure way. .
Why use Rsync?

When copying or moving large no. of files using tools like cp and mv may leave ur data in inconsistent state with part of it still in the original location and part of it in the target destination in case of any interruptions.
Read 29 tweets
Rakesh Jain Profile picture
9 Oct
These days we are hearing a lot about #web3.

What's that?

A short thread πŸ‘‡
What was web1 or web?
The very first stage of development on the World Wide Web where only simple static websites used to exist.

Those were the times when Personal web pages (mostly static pages) used to be hosted on ISP-run web servers, or on free web hosting services.
What is web2?

Today's internet is all about web2. As per @Wikipedia Web 2.0 refers to websites that emphasize user-generated content, ease of use, participatory culture and interoperability for end users where websites and apps allow anyone to create content and share.
Read 5 tweets
Rakesh Jain Profile picture
9 Oct
Kubernetes security best practices in short -

A Thread πŸ‘‡ PC: Threat Stack
1. Keep the Kubernetes cluster up to date.
2. Ensure That Only Authorized Images are Used in Your Environment
3. Limit Direct Access to Kubernetes Nodes
4. Create Administrative Boundaries between Resources
5. Keep Secrets Secret!
6. Define Resource Quota
7. Implement Network Segmentation
8. Apply Security Context to Your Pods and Containers
9. Restrict API access.
10. Restrict SSH access.
Read 6 tweets
Rakesh Jain Profile picture
9 Oct
Linux Networking Tools -

ss, nmap, dig, netcat, ping, tcpdump, socat, top, ethtool

A Thread πŸ‘‡
SS -

ss command is a tool that is used for displaying network socket related information on a Linux system.
nmap -

Nmap is short for Network Mapper. It is an open-source Linux cmd-line tool that is used to scan IPs & ports in a nw & to detect installed apps. Nmap allows nw admins to find which devices r running on their nw, discover open ports & services, and detect vulnerabilities.
Read 12 tweets

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