Posts

Showing posts with the label Bash

Featured Post

Step-by-Step Guide to Creating an AWS RDS Database Instance

Image
 Amazon Relational Database Service (AWS RDS) makes it easy to set up, operate, and scale a relational database in the cloud. Instead of managing servers, patching OS, and handling backups manually, AWS RDS takes care of the heavy lifting so you can focus on building applications and data pipelines. In this blog, we’ll walk through how to create an AWS RDS instance , key configuration choices, and best practices you should follow in real-world projects. What is AWS RDS? AWS RDS is a managed database service that supports popular relational engines such as: Amazon Aurora (MySQL / PostgreSQL compatible) MySQL PostgreSQL MariaDB Oracle SQL Server With RDS, AWS manages: Database provisioning Automated backups Software patching High availability (Multi-AZ) Monitoring and scaling Prerequisites Before creating an RDS instance, make sure you have: An active AWS account Proper IAM permissions (RDS, EC2, VPC) A basic understanding of: ...

How to Write Recursive Shell Script in Bash Terminal

Image
Here's a simple bash recursive function. To write it, you can use JavaScript and other scripting languages. Below is the example that shows you how to write a recursive function in the bash shell. Recursive function Precisely, calling the same function within it is called the Recursive function. We call itself and its contents.  Moreover, the recursive functions go in the loop due to self-calling. While writing the code, ensure it has a condition that breaks the loop. Recursive logic #!/bin/bash for ((i = 1; i < 65; i++)) { ((arr[i - 1] = i)) } i = 1; key = 8 function linear_search { echo "Element value: ${arr[$i-1]}" if ((arr[i - 1] == key)) then echo "Linear search found $key on attempt $i" return 0 => it breaks the loop else ((i++)) linear_search = > Calling th same script fi } linear_search = > Calling the same script Output Here is the dissection of the output. Displayed the array's elements until match-condition occurs. In the end, a displa...

Here is Sample Logic to get Random numbers in Bash

Image
Here's a bash script to generate a random number. You can use this logic to generate a random number, and it is useful for AWS engineers. Random number Script - Here's sample logic to get a random number RANDOM=$$ # Set the seed to the PID of the script UPPER_LIMIT=$1 RANDOM_NUMBER=$(($RANDOM % $UPPER_LIMIT + 1)) echo "$RANDOM_NUMBER" If you select UPPER_LIMIT as 100, then the result would be a pseudo-random number between 1 and 100. Her is the output after executing the script Related posts Structured Vs. Un-structured data