Amazon AWS Securty Groups / Virtual Firewall General Guidelines If using VPC (not EC2-Classic), Security Groups are owned by VPC (Virtual Private Cloud) Security Groups are applied to EC2 instances (zero to many) Security Groups cannot span regions Instances belonging to the default security group can talk to each other. Instances belonging to a custom …
Amazon AWS Securty Groups / Virtual Firewall General Guidelines Read More »
AWS Amazon Static Website Hosting – Error adding Route 53 alias record S3 The record set could not be saved because: – Alias Target contains an invalid value. The bucket name has to match the alias name you are defining exactly. So for example: if your bucket is named “mydomain.com” then the alias name has …
AWS Amazon Static Website Hosting – Error adding Route 53 alias record Read More »
VirtualBox supports the following types of adapters (and others) that I use frequently for many VMs. Bridged Adapter – Makes the VirtualBox VM part of your local network. Host-Only-Adapter – Makes the VirtualBox VM part of a virtual network on the VM Host. NAT – Can get out to the network – but your IP is …
Use find to search an entire directory tree and return filenames that include a string: find . -name “*” -exec grep -ils Jan28 # {} \; ./junkDir/myfile # cat ./junkDir/myfile Jan28 the -s switch on the embedded grep silences error messages including: grep: ./junkDir: Is a directory
Generally, a forward proxy is used to funnel traffic originating inside a business network to the outside / internet. A reverse proxy does the opposite by receiving protecting or buffering a 2nd server(s) inside a network from requests originating from outside the network. Generally, a proxy receives requests on an internal network from the internet.
# Installing, configuring, and starting noip DUC Dynamic Update Client For EC2 Amazon Linux 2, CentOS 7, RHEL 7, Oracle Linux 7. For those who have not heard and care, AWS released an AMI Linux 2 image for EC2 – that is systemd based & appears to be RHEL 7 based in December of 2017. …
AWS Lambda allows users to run programs triggered by both events and schedules without provisioning service at all – no EC2, no RDS nada. At the time of this writing – the programs can be written in in Node.js (JavaScript), Python, Java 8, and C# (.NET Core) and Go.
When you create and launch AWS resources like an EC2 Linux instance – at the time you create the resource – you define a default region and zone that it will run in. Regions are large areas of coverage related to geographic regions around the world. Zones exist within regions. For example at the time …
AWS Regions & Availability Zones – at a very high level Read More »
How to avoid using root user on AWS console by defining IAM users, policies, groups and roles. There are three principals that can authenticate and interact with AWS resources. They are the 1.) root AWS user, 2.) IAM users, and 3.) roles. When you first create an AWS account – you create a root AWS …
Just a categorized list of Oracle performance tools at this stage… Oracle Enterprise Manager – OEM Tools – OEM 12 and forward AWR Reports – Historical Windows ASH Reports – Real Time SQL Advisor SQL Profiler – uses active or historical GUI Explain Plan Top Active SQL – under performance tab and then the grandfather …
Methods To Analyze Performance and Debug Oracle SQL and PL/SQL Read More »