amazon s3 - S3: make a public folder private again? - Stack Overflow

Grant public read access to some objects in Amazon S3 bucket

How can I grant public read access to some objects in my Amazon S3 bucket? - YouTube

• Bucket Policy  &  Tags

https://helpcenter.gsx.com/hc/en-us/articles/207831828-How-to-identify-the-Cipher-used-by-an-HTTPS-Connection
Chrome 

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/TroubleshootingInstancesStopping.html

Cloudwatch -> Metrics -> Explorer

Explorer -> EC2

Explorer -> Elastic Block Store

From -> InstanceId: i-000528b883bf29b49

https://aws.amazon.com/premiumsupport/knowledge-center/ec2-linux-resource-over-utilization/

UFW 
sudo ufw status
sudo ufw disable

2 Status Checks
System status checks     System reachability check passed 
Instance status checks   Instance reachability check failed

Note: A stop and start isn't equivalent to a reboot. A start is required to migrate the instance to healthy hardware.

The instance must be migrated to a new, healthy host by stopping and starting the instance. You can wait for Amazon EC2 to perform the stop and start of your instance. Or, you can manually stop and start the instance to migrate it to a new, healthy host.

When the instance is in the running state, choose Actions, Monitor and troubleshoot, Get system log.

https://forums.aws.amazon.com/thread.jspa?threadID=84461

By default EC2 instances are not redundant, Redundancy is achieved through using our other services such as Auto-scaling and Elastic lad balancing where you can mitigate around instance failure and make your application resilient of the components that it's running on. 

You have to construct your server stack in a way that you don't care of the entire server goes away. In other words, keep your data in non-instance storage (EBS volumes, RDS, SimpleDB, S3). You have to have the mentality that your "instance" can go away at any time and it won't bother you, because you can click once and start up another one.

https://aws.amazon.com/ec2/instance-types/

https://towardsdatascience.com/choosing-the-right-gpu-for-deep-learning-on-aws-d69c157d8c86

AWS_Storage_EBS_InstanceStore_EFS_S3.png (822×1088) (karanawsbucket.s3.amazonaws.com)

Windows UserHome Directory Shortcut %USERPROFILE%

 %USERPROFILE%      in Window     ===    ~ in Linux

Copy Top 'Latest Modified 10 Files" from Linux Server and Download it to Local Laptop

https://stackoverflow.com/questions/15691359/how-can-i-list-ls-the-5-last-modified-files-in-a-directory

https://stackoverflow.com/questions/16886179/scp-or-sftp-copy-multiple-files-with-single-command

https://stackoverflow.com/questions/1706882/get-the-date-a-day-before-current-time-in-bash

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ssh kk@10.102.20.43                                                                

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cd /efs/datadrive/app-data/vea/output/reports                                

---------------------------------------------------------------------------------------

ls -1t | head -8                                         # Its One 1 , not "L"       

---------------------------------------------------------------------------------------

ls -1t | head -8 | tail -7                               # date +%d-%m-%Y            

---------------------------------------------------------------------------------------

date +%d-%m-%Y -d "2 day ago"                            # date --date='-2 day'    

---------------------------------------------------------------------------------------

mkdir -p                                        # xargs  date +%d-%m-%Y -d "2 day"   

---------------------------------------------------------------------------------------

zip                                                                                

---------------------------------------------------------------------------------------

scp 703250313@10.102.20.43:/efs/datadrive/app-data/vea/output/reports/21-6-2021.csv .

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Unix Libraries - for windows (Alternatives) : GitBash and GOW(GNU on Windows)

 I have used  -  Git Bash, and GOW (GNU on Windows)

https://github.com/bmatzelle/gow/releases    [Unix Libraries]

BEST COLLECTIONS OF UNIX LIBRARIES FOR WINDOWS
-- Windows Subsystem for Linux· · ·
-- Cygwin· · ·
-- Gnu On Windows· · ·
-- Git for Windows· · ·
-- MobaXterm· · ·
-- UnxUtils· · ·
-- MSYS2· · ·
-- Git BASH· · ·
-- GnuWin· · ·

Record Set, Hosted Zone, DNS , Route 53, AWS

 DNS has Record Set Types:

A record   --> Domain URL points to IP address at TCP Level [ dummy.com   -> StaticIP_LoadBalancer]

CNAME record --> dummy.com   -> Alternate.com

NS record -> its not actually a website, but at Nameserver Level [Not very usual[

SSL can be embedded in DNS - DNS is Network level , Not Http Level

DNS is LEVEL4 - N/W Layer

HTTPS/SSL is Layer 7(6)  - Above 4

So, DNS is merely Server resolving , it does not know anything at SSL TLS HTTPS level

So, We direct DNS to Load Balancer 

Load Balancer has a listener which redirects traffic internally 

Load Balancer is at TCP Port 80

TCP Port 80 redirects to Port 443 at Load balancer Level

here at LB SSL offloading Happens

PFX File, CER File is issued to "DNS Name " and "Subject Alternative Names" to FQDN of Host Backends

DNS has Record Set Types:

A record

CNAME record

NS record