In this blog we will learn, how to add permission or role in existing User. In this we will use db.updateUser() method to update the user’s profile on the database on which you run the method. An update to a field completely replaces the previous field’s values. This includes updates to the user’s roles array. Steps to …

Find Largest Directories in Linux To display the biggest directories in the current working directory: 1du -a | sort -n -r | head -n 5 Let us break down the command and see what says each parameter. du command: Estimate file space usage. a : Displays all files and folders. sort command : Sort lines of text files. -n : …

Today we will see, how to resolve the error "mysqld_safe Directory '/var/run/mysqld' for UNIX socket file don't exists.". This error you may see, when you try to run MySQL in safe-mode. 1: create a mysqld Directory in /var/run Directory. 1mkdir -p /var/run/mysqld 2: change the ownership of that folder: 1chown …

Today we will learn how to provide root permission to your SSH user. So, We can provide SSH user root permission either move them in root user group or We can add simple line in sudoers file to provide root permission. Lets use the first method. Provide ROOT permission to this user by move it to root user. 1usermod -aG …

Today I will show you, how can you create you private and public key using ssh-keygen command. Connect to you Linux system. Open Linux terminal. Run below command to generate keys. 1ssh-keygen -t rsa -b 2048 Enter the name of the key and press Enter Now private and public key has been generated. Now you can use those …

Today I will show you, how can you get SSH private key from AWS console and convert that key into public key. So, that you can use that key for create a SSH user. So, First lets with downloading a key from AWS Console. To create your key pair. Please follow the below steps: Open the Amazon EC2 console at …

Today we will create new user that can connect to my Linux instance/Server using SSH key Authentication method. When you launches a Linux server, a default system user account created with administrative access to the server. If you wants multiple users access to the instance, it's a security best practice to create a …

Today, we faced a problem where our client application was not working because of the database connection issue. I have checked and found that their credentials were incorrect. As per the client, this was that same credentials which their application was using. So, To resolve the problem, we decided to reset the root …

Today we will learn, How to extend your AWS EC2 EBS volume disk without Downtime. If you are using Windows you can easily extend your EBS drive without downtime and without any problem. You can use this link for window process. But if come to Linux, Disk extend part will become some headache. So, Let start the process …

Hello Everyone, Today we will learn How to create FTP user in Linux/EC2 server. We will use this ftp user to connect our Linux server from our local machine via Filezilla or other FTP clients. So, First connect the Linux Server: Install FTP Server(vsftpd) For Ubuntu: sudo apt-get install vsftpd For Centos or …