https://devopscube.com/mount-ebs-volume-ec2-instance/
sudo cp /etc/fstab /etc/fstab.bak
/dev/xvdf /hdd2 ext4 defaults,nofail 0 0
https://devopscube.com/mount-ebs-volume-ec2-instance/
sudo cp /etc/fstab /etc/fstab.bak
/dev/xvdf /hdd2 ext4 defaults,nofail 0 0
https://aws.amazon.com/getting-started/tutorials/create-network-file-system/
EBS --------> 1 EC2 Instance is mapped to EBS - Block Level Storage
EFS ----------> Multiple EC2 Instances - Mounted to this File System - Common across multiple Apps
The main differences between EBS and EFS is that EBS is only accessible from a single EC2 instance in your particular AWS region, while EFS allows you to mount the file system across multiple regions and instances.
S3 --> S3 is Object Level storage. S3 is not limited to EC2, Its linked to CloudFront through which many Media etc are hosted there.
https://www.tecmint.com/fix-no-route-to-host-ssh-error-in-linux/
https://www.cyberciti.biz/faq/how-to-list-all-iptables-rules-in-linux/
sudo nmap -p 6900,25,22,8080,21000,7856,9084 10.79.197.70
sudo iptables -S
sudo nmap -p 6900,25,22,8080,21000,7856,9084 10.79.197.70
sudo iptables -D IN_public_allow -p tcp -m tcp --dport 7856 -m conntrack --ctstate NEW,UNTRACKED -j ACCEPT
sudo iptables -A IN_public_allow -p tcp -m tcp --dport 7856 -m conntrack --ctstate NEW,UNTRACKED -j ACCEPT
https://aws.amazon.com/marketplace/pp/prodview-epy3md7fcvk4g?ref=cns_srchrow
https://www.fugue.co/blog/cloud-network-security-101-aws-security-groups-vs-nacls
https://www.javatpoint.com/aws-nacl-vs-security-group
https://mylearningsonline.com/aws-services/aws-vpc-security-group-nacl/
https://www.davidc.net/sites/default/subnets/subnets.html
https://www.baeldung.com/linux/grep-sed-awk-differences#1-basic-syntax-1
chattr +i [To make it immutable, Its not related to access permissions] - Change Attribute
SetUserBit
SetGroupBit chmod 2775 chmod +ug rw
which Which executable
whereis
https://stackoverflow.com/questions/39239276/how-to-enable-a-directory-listing-in-apache-web-server
ls -l . | grep ^d | awk '{print $9}' | xargs rm -rf
ls -al | grep -E '^-.*ml'
ls -l | grep -E '^-.*ml' | awk '{print $9}' |xargs rm -f
https://www.thegeekstuff.com/2011/10/grep-or-and-not-operators/
https://stackoverflow.com/questions/219402/what-linux-shell-command-returns-a-part-of-a-string
https://learn.microsoft.com/en-us/azure/devops/pipelines/process/approvals?view=azure-devops&tabs=check-pass