Step 1: Save the Current PM2 State

Before updating Node.js, save the current PM2 process list to restore it later. Run:

pm2 save

This ensures that your running applications and their configurations are backed up.

Step 2: Disable PM2 Auto-Start

If PM2 is set up to start automatically on system boot, disable it before updating Node.js:

pm2 unstartup

This prevents conflicts during the update process.

Step 3: Update Node.js

Use a version manager like NVM (Node Version Manager) to update Node.js.

Refer my Blogs to Update / Install

1. Install / Update NVM in Ubuntu

2. Install/ Upgrade Node in Windows

Verify the installation:

node -v

Step 4: Reinstall PM2

Since PM2 is installed globally, updating Node.js may remove it. Reinstall PM2 using:

npm install -g pm2

Step 5: Update PM2

Ensure PM2 is updated to the latest version to avoid compatibility issues:

pm2 update

Step 6: Restore the Previous PM2 State

Reload the saved process list to restore your applications:

pm2 resurrect

Step 7: Re-enable PM2 Auto-Start

If you want PM2 to start automatically on system reboot, reconfigure it with:

pm2 startup

Follow the on-screen instructions to complete the setup.

Step 8: Reload Applications with the New Node.js Version

Finally, reload your applications with the updated environment variables:

pm2 reload <app-name or index> --update-env

Conclusion

By following these steps, you can seamlessly update your Node.js version while ensuring that your PM2-managed applications continue running smoothly.

Let me know if you need further clarification! 🚀

Refrences:

1. PM2’s update documentation

I am using the below commands to reset the MySQL root user password in the Ubuntu 22 LTS.

1. Stop the MySQL by the following commands

sudo systemctl stop mysql

sudo /etc/init.d/mysql stop

2. Run the mysqld

sudo mysqld_safe --skip-grant-tables &

If you face the error like below,

mysqld_safe Directory '/var/run/mysqld' for UNIX socket file don't exists

Then run the below commands, to create and folder and update the permission

sudo mkdir -p /var/run/mysqld
sudo chown mysql:mysql /var/run/mysqld

3. Login into the MySQL

Use the below command to login, without password

mysql -u root

Change the databse to mysql, by usnig the below command

use mysql;

Flush the privileges

FLUSH PRIVILEGES;

Try to alter the password, by using the command

ALTER USER 'root'@'localhost' IDENTIFIED BY 'password';

If you face the below error

ERROR 1524 (HY000): Plugin 'auth_socket' is not loaded

Then, update the Plugin for authentication

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password'

Exit from mysql

exit

4. Stop the MySQL service

sudo systemctl stop mysql

5. Start the service

sudo systemctl start mysql

And, try to login into mysql now with new password you set

mysql -u root -p

Hope it will prompt for password, Enter the password

password:

I followed the instructions to install those modules from this GitHub repo.

1. Find the vmware version installed

   To find version of the vmware installed, run the below command

    vmware -v
   

   It will show the output as

    VMware Workstation 17.5.0 build-22583795/code
   

   From the baove out the version of the vmware installed is 17.5.0

2. Get the code form Github

   Go to this github repository and branches, click the all tab. Search for the version you have installed like shown below.

   

   Copy the branch name, and run the below command to get the source code into your system(Host).

    git clone -b branch-name https://github.com/mkubecek/vmware-host-modules.git
   

   Replace the branch-name with, you copied from github repository

3. Compile and Install

   Go to directory vmware-host-modules like cd cmware-host-modules, And run the following two command. Make sure all VMs are stopped

    sudo make
    sudo make install
   

   Restart the vmware by using the below command

    sudo systemctl restart vmware
   

   Then, open the vmware it will work smoothly and won’t show the pop to install the moduels again.

   For more visit this installtion guide from the author

The above soultion may not presist for every reboot. So, we may need to do every time the system reboots. To overcome from this, do the following

1. Create a Module Configuration File

1. Navigate to the modules-load.d directory:

    cd /etc/modules-load.d/
   

2. Create a new file for VMware modules:

    sudo nano vmware-modules.conf
   

2. Add VMware Modules

Add the following lines to the file to specify the modules to load:

vmmon
vmnet

3. Update Dependencies

Run depmod to ensure the system recognizes the modules:

sudo depmod -a

Now the modules will be loaded automatically every time the system reboots.

Steps for Setting Up Basic Authentication:

1. Create User Details: In /etc/haproxy/haproxy.cfg, add the user list:

    userlist listofuser
      user udhay insecure-password udhayspassword
      user optionalAnotherUser insecure-password unsafepassword
   

   Replace with your own credentials. However, using plain-text passwords is insecure. To create hashed passwords, follow these steps:

2. Hash the Password: Install the mkpasswd tool:

   1. Install the mkpasswd tool:

       sudo apt install whois
      

   2. Has the password

       mkpasswd -m sha-256 mypassword
      

      The above will command will prove the hashed password as output like below,

       $5$s6Subz0X7FSX2zON$r94OtF6gOfWlGmySwvn3pDFIAHbIpe6mWneueqtBOl/
      

   3. Replace the plain password

      So you can replace the plain text password by hashed password. Then, the userlist will be

       userlist listofuser
         user udhay password $5$s6Subz0X7FSX2zON$r94OtF6gOfWlGmySwvn3pDFIAHbIpe6mWneueqtBOl/
         # Other users
      

3. Add Basic Auth in HAProxy: Update your HAProxy configuration:

    # Other config goes here
    frontend example_frontend
      # Other config goes here....
      bind :443 ssl crt /etc/haproxy/ssl/udhay.dev.pem
      use_backend private_site if { hdr(host) -i udhay.dev }
      # Other backends will go here..
   
    backend private_site
      # Add your other configs
      http-request auth unless { http_auth(listofusers) }
      server web_server 127.0.0.1:80
   

By following these steps, you'll have basic authentication enabled to secure your site.