AWS: EC2: Create Signature from Private Key - EC2 to verify if its the same one

openssl pkcs8 -in ./ProjKey.pem -inform PEM -outform DER -topk8 -nocrypt | openssl sha1 -c

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html#verify-key-pair-fingerprints

Kubectl - Kubernetes -1

eks@ABCDAWS01:/$ kubectl get pods -n fda | awk '/case-management/{print $1}'
case-management-6b66d59f44-b6fph

eks@ABCDAWS01:/$ kubectl get pods -n fda | awk '/case-management/'
case-management-6b66d59f44-b6fph      1/1     Running   0          37m

eks@ABCDAWS01:/$ kubectl get pods -n fda |grep -E 'business|case|platform|output'
business-rules-68b8c55fd4-5gm8k       1/1     Running   0          37m
case-management-6b66d59f44-b6fph      1/1     Running   0          37m
output-generation-74b548d65b-fc44z    1/1     Running   0          37m
platform-7b5c6965c8-s2cv6             1/1     Running   0          36m

GetEnt : Linux Commands

getent command in Linux with examples

getent is a Linux command that helps the user to get the entries in a number of important text files called databases

https://www.geeksforgeeks.org/getent-command-in-linux-with-examples/

AWS : EC2 :Full Troubleshooting List

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/TroubleshootingInstancesConnecting.html#TroubleshootingInstancesServerError

Connection problems and errors

• Common causes for connection issues
• Error connecting to your instance: Connection timed out
• Error: unable to load key ... Expecting: ANY PRIVATE KEY
• Error: User key not recognized by server
• Error: Permission denied or connection closed by [instance] port 22
• Error: Unprotected private key file
• Error: Private key must begin with "-----BEGIN RSA PRIVATE KEY-----" and end with "-----END RSA PRIVATE KEY-----"
• Error: Server refused our key or No supported authentication methods available
• Cannot ping instance
• Error: Server unexpectedly closed network connection
• Error: Host key validation failed for EC2 Instance Connect

AWS : EC2: EBS : Mounting /Attaching EBS Volume : Duplicate UUID : Issue

sudo   mount -o   nouuid    /dev/xvdf2    /mnt/temp
 

https://stackoverflow.com/questions/55833917/unable-to-mount-a-volume-on-an-ec2-instance/55845557#55845557

https://stackoverflow.com/questions/55833917/unable-to-mount-a-volume-on-an-ec2-instance

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/TroubleshootingInstancesConnecting.html#TroubleshootingInstancesServerError

Linux "Stat" Comand | OCTAL Permission

 stat - -format="%a" /path1/subdir

https://www.cyberciti.biz/faq/get-octal-file-permissions-from-command-line-on-linuxunix/

https://unix.stackexchange.com/questions/188674/how-to-get-file-permission-in-octal

To just see octal file permissions on a GNU/Linux:
$ stat -c '%a' /etc/passwd

linux "Id" Command

https://www.geeksforgeeks.org/id-command-in-linux-with-examples/