Linux Commands
Convert String to Lowercase in Bash – Easier Than You Think
Question: How do I convert all the characters to the lowercase of a string in the bash shell script? In…
General Articles
(Resolved) Key is stored in legacy trusted.gpg Keyring
I recently created a new Ubuntu 22.04 LTS Linux virtual machine. When I attempted to set up the PostgreSQL server…
MySQL
(Resolved) Unknown collation: utf8mb4_unicode_520_ci
A collation is a set of rules that defines how to compare and sort character strings in a database server.…
Bash Shell
How to Detect and Handle Errors in Your Bash Scripts
We can use the trap command to catch the error signal system by the system during script execution. Then you…
General Articles
How to list all collections in MongoDB database
Question – How do I list all the collections available in the MongoDB database? MongoDB is a NoSQL database, that…
General Articles
Mongodb – Get the last record from collection
MongoDB find() method is used to select documents from a specified collection. It also set the cursor position to the…
General Articles
Running a Cron Every 10, 20 or 30 Minutes
Cron is a service that runs tasks at specified intervals in Unix/Linux systems. It’s commonly used for operational tasks like…
General Articles
Running a Cron Every 5 Minutes
Running a job every 5 minutes is a commonly used cron schedule. In this quick how-to article, you will learn…
General Articles
Check if a script is running as root user in Linux
Sometimes the shell scripts are required to run as the root user to perform some tasks with administrator privileges. Generally,…
General Articles
YYYY-MM-DD Date Format In A Shell Script
The use of the YYYY-MM-DD date format in shell scripting is highly beneficial for ensuring consistency, clarity, and sorting efficiency…