Knowledge is Power!
Multitenancy is a concept in which a single instance of a software application or service serves multiple customers or "tenants." Each tenant has their own isolated environment, separate from other tenants, and is only able to access and modify their own data. In simple words, it means that
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Quick peek-a-boo :P => /var/log/messages : General log messages => /var/log/boot : System boot log => /var/log/debug : Debugging log messages => /var/log/auth.log : User login and authentication logs => /var/log/daemon.log : Running services such as squid, ntpd and others log message to
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Basic understanding Story is kinda similar to DNs basics. * There is a sender and a receiver. Both have their Email server. * To make it easy these mail server can be gmail, yahoo, orkut etc. * EX:Sender's mail: sender@gmail.comReceiver's mail: receiver@yahoo.comsender wants to
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Backdated data refers to data that is recorded or entered into a system with a date that is earlier than the current date or the date of the data collection. Backdated data can occur when data is recorded or entered manually, and the person responsible for recording the data enters
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When you're building a new system, you need to decide what kind of "filing cabinet" to use. This "filing cabinet" is called a database. A database is a tool that helps you store and find information easily. Just like a toy box where you
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Run a file as root irrespective of who is running it. It is a file permission, delegated as `s` allowing current user to execute that file as root. Yeah, kinda like a sudo To set up setuid: touch delete.sh @: ls -l - rw-r--r-- 1 niva niva 0 Dec 5
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Cron job to upload files on s3 #!/bin/bash end=$((SECONDS+300)) mkdir -p samay cd samay while [ $SECONDS -lt $end ]; do # Do what you want. touch $(date "+%F-%T")_file.txt sleep 60 aws s3 sync ../samay s3://<bucket_name>/ --region ap-south-1 : done
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Swagger is a tool that helps to document APIs Objective: Have my API documentation hosted. Choose to do Static website hosting behind CloudFront Note: One can avoid CloudFront, by directly hosting in S3. But there is a problem, S3 bucket doesn’t support https... issue related to SSL. Hence using
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Parameter Group ❓ What is parameter group in RDS? 🍕 It's a group of variables that can be used on the database(s). These variables are pre-defined. We can use these variables to our advantage. Ex: by enabling log variable I can get logs. can set maximum connection my DB
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IAM what's that? It is pretty quirky to understand but extremely powerful.Cannot dive deep at once, experiment with code-base and enhance the understanding. But to get started, think of it as A tool-set to control the access to resources provided by AWS. Just generalizing the idea, access
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Pre-requisites Understanding of DNS routing is necessary.Click here to have some picturesque. Route 53 is an Authoritative DNS and webserver i.e. ISP DNS finally contacts Rout53 which has IP address of the webserver. Gotchas 🦋 Route53 just gives the reply (IP) doesn't route traffic 🦋 For every request(
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Makes it possible to create own network within AWS's network (ipv4/v6) i.e. virtualize network on top of the physical layer by defining the desirable range of IPs Components Subnets 🧁 CIDR specifies a range of IP addresses. 🧁 Once the range is decided, further split it into a