 The Next.js is React Based framework with server side rendering capability. It is very fast and SEO friendly. Using Next.js, you can create robust react based application quite easily and test them. 

In Next.js, we can serve modify the head section of each react pages very easily with the help of <Head> react component which is inbuilt.

Let's update the nextjs project used in Pages chapter.

import Link from 'next/link'
import Head from 'next/head'

function HomePage() {
   return (
      <>
         <Head>
            <title>Welcome to Next.js!</title>
         </Head>
         <div>Welcome to Next.js!</div>
         <Link href="/posts/first"><a>First Post</a></Link>
         <br/>
         <img src="/logo.png" alt="TutorialsPoint Logo" />
      </>	    
   )
}

export default HomePage

next js

Kibana, the popular open-source data visualization tool, is a crucial component of the ELK (Elasticsearch, Logstash, Kibana) stack. However, users may encounter a frustrating issue where Kibana gets stuck on the "Kibana server is not ready yet" message. In this blog post, we will explore common causes of this problem and provide troubleshooting steps to resolve the issue and get your Kibana instance up and running smoothly.

The "Kibana server is not ready yet" message can indicate a connection problem between Kibana and Elasticsearch. Check if Elasticsearch is running and accessible by Kibana. Ensure that the Elasticsearch URL and credentials in the Kibana configuration file (kibana.yml) are correct. Restart both Elasticsearch and Kibana services to establish a fresh connection.

Review the Kibana configuration to identify potential misconfigurations. Ensure that the server.host parameter in the kibana.yml file is correctly set to the appropriate IP address or hostname. Verify that the server.port is not conflicting with other services on the host machine. Additionally, check the logging information in the Kibana logs (kibana.log) for any specific error messages or warnings that could indicate configuration issues.

Inadequate system resources, such as CPU or memory, can lead to Kibana startup issues. Check the system resource utilization using monitoring tools. If Kibana is running on a machine with limited resources, consider optimizing resource allocation or upgrading the infrastructure to meet Kibana's requirements. Adjusting JVM heap size parameters in the kibana.yml file can also help mitigate resource-related issues.

Corrupted or inconsistent data within the Kibana index or cache can cause startup problems. Stop the Kibana service and delete the Kibana index in Elasticsearch. This will trigger Kibana to create a new index upon startup. Additionally, clear the contents of the Kibana data and optimize cache directories. Restart Kibana after performing these cleanup steps to see if the "Kibana server is not ready yet" issue is resolved.

If all else fails, consider upgrading to the latest stable version of Kibana or reinstalling it. Bugs or compatibility issues in older versions can lead to startup problems. Before upgrading or reinstalling, make sure to backup any important Kibana configurations, dashboards, or visualizations. Follow the official documentation for proper installation and configuration steps. After the upgrade or reinstallation, validate the Kibana setup and ensure that the "Kibana server is not ready yet" error no longer persists.

Encountering the "Kibana server is not ready yet" issue can be frustrating, but with the right troubleshooting steps, it can be resolved. By following the suggestions outlined in this blog post, you can diagnose and address potential causes of the problem, allowing you to get Kibana up and running smoothly for effective data visualization and analysis.

This blog post offers troubleshooting steps to resolve the "Kibana server is not ready yet" issue, covering configuration, connectivity, resources, data, and potential upgrades.

Troubleshooting "Kibana server is not ready yet" Issue

Basically, I am looking for a way to pull the date that the SQL instance was created, using TSQL, ie a CreateDate for the server itself. I could find nothing in the docs or the site. I know I can go scrolling through the system to find a date in the file system, but thought that their might be a way to do it as easily as I can for sys.objects. I thought that maybe I could use a CreateDate off of a table in master or msdb, but that seems to be the date that MS created those. I am running 2019. Any suggestion would be helpful.  

SQL Server Create Date From TSQL

How can I see all my webserver process running in Websphere application server administration? 

Websphere App Server administration

After installing Wakanda Enterprise server version 2.2.1 on Ubuntu 16.04 LTS we can't open the Wakanda Server Administration page for starting a solution. Ports 4433 and 8080 have been enabled on the Ubuntu server. The page shows the Wakanda icon in the tab but the page stays blank. 

If you are experiencing issues accessing the Wakanda Server Administration page after installing Wakanda Enterprise Server, there could be a few potential reasons for the problem. Here are some troubleshooting steps you can try:

Check the Server Status: First, make sure that the Wakanda Server is running. You can do this by checking the status of the Wakanda process on your Ubuntu server. Open a terminal and run the following command:

If the Wakanda server is not running, start it using the following command:

Verify Listening Ports: Ensure that Wakanda is listening on the correct ports (4433 and 8080) for incoming connections. You can use the netstat command to check if the ports are in the "LISTEN" state:

sudo netstat -tuln | grep -E ':(4433|8080)'

If the ports are not listed or not in the "LISTEN" state, it might indicate an issue with Wakanda's configuration or the installation.

Check Firewall Settings: Verify that no firewall rules are blocking incoming connections on ports 4433 and 8080. You can temporarily disable the firewall to see if it resolves the issue. If the problem persists, re-enable the firewall and configure it to allow incoming connections on those ports.

Clear Browser Cache: Sometimes, browser cache issues can cause problems with loading web pages. Try clearing your browser's cache and cookies and then try accessing the Wakanda Server Administration page again.

Try a Different Browser: If the issue persists, try accessing the administration page from a different web browser to rule out any browser-specific problems.

Check Logs: Look for any error messages or logs related to the Wakanda server to identify any potential issues. The logs are typically located in the Wakanda server installation directory.

Update or Reinstall: Ensure that you are using the latest version of Wakanda Enterprise Server. If the issue persists, consider reinstalling Wakanda to see if it resolves the problem.

Contact Support: If none of the above steps resolve the issue, consider reaching out to Wakanda's support or community forums for further assistance. They may have encountered similar issues and can provide additional guidance.

Please note that the specific steps and solutions may vary depending on the version and configuration of the Wakanda Enterprise Server, as well as the environment in which it is installed.

Wakanda Enterprise Server Install No Server administration page

I have Oracle WebLogic server and Oracle Forms 12c on it, I configured webutil configuration file (webutil.cfg) by editing it, but when the WebLogic Administration server restarted (using startWebLogic.sh) it overrides the webutil.cfg file and restores it to its default values removing my editing in it.

My Question is how to make the webutil.cfg not changed by the WebLogic Administration server when restarted ?

webutil.cfg file is overridden when WebLogic Administration Server restated

I am setting up a new print server (Server 2016 Std, VM in VMware 6.0). I find myself needing to make the same change (e.g. check boxes to share each printer, list each printer in directory, set printer locations for several printers to the same value, etc.) over and over for each printer. Given we have over 100 printers managed by the print server, this can be a very time consuming task to right-click on each printer, make the changes, and then repeat for each printer.

I'm sure there's a way to "batch" change these settings, but I can't seem to find it in Print Management. Can anyone point me in the right direction?

Mass/Batch Changes to Printers in Print Management

We have setup Azure B2B Multi-tenant AD which allows external user as guest. Setup works well but for some reason few of our external customers (guest users) are not able to login.

Few are getting Admin Consent and few are getting these error message - 'Using application MYAPPNAME is currently not supported for your organization customer.org because it is in an unmanaged state.An administrator needs to claim ownership of the company by DNS validation of customer.org before the application MYAPPNAME can be provisioned.'

Major change we made here is from Single Tenant App to Multi-tenant Azure AD App.

I'm not sure about the login issue. I can tell you only about the failure to update policy.

As you configure cross-tenant access settings, if you receive an error that says “Failure to update policy due to object limit,” you've reached the policy object limit of 25 KB. We're working toward increasing this limit. If you need to be able to calculate how close the current policy is to this limit, do the following:

Open Microsoft Graph Explorer and run the following:GET https://graph.microsoft.com/beta/policies/crosstenantaccesspolicy

Copy the entire JSON response and save it as a txt file, for example policyobject.txt.

Open PowerShell and run the following script, substituting the file location in the first line with your text file:

 $policy = Get-Content “C:\policyobject.txt”

 $size = [System.Text.Encoding]::UTF8.GetByteCount($policy)  

 write-host "Remaining Bytes available in policy object"

write-host "Is current policy within limits?" 

if ($size -le $maxSize) { return “valid” }; else { return “invalid” }

For more details You can follow the documentation.

Azure B2B Multi-tenant application external user login issue

Our university is planning to install the latest stable moodle as our primary LMS. The university has 20,000 students. Based on our initial projection, we have an average of 250 subjects open for every semester, 700 faculties, and around 6,000 concurrent student users. With this kind of requirement, we wanted to install moodle on a dedicated or on a cluster server but we are still confused with the exact hardware specifications to purchase. For example, RAM, Hard disk, CPU, and bandwidth allocation. 

For your requirement, you may need only a memory-optimized convertible reserved instance (EC2). I have installed Moodle for several institutions.

What are the exact hardware requirements for Moodle installation on a large University?

I have a PHP project with Mysql database. The problem is the time related data is showing wrong according to my requirements.

I want the timezone should be set to "Time Zone Port louis,Mauritius GMT+04:00".

How to update the timezone so that every data in the database shows the Mauritius timezone? And where to update the timezone?

And if I change the timezone, does the already inserted data automatically updated? Or else how to update the timezones of every record in the database?

It is generally a good idea to keep your server in UTC so that security logs align between computers.

When storing timestamps in a database, it is recommended to use a Timestamp field that includes a timezone. This means that the timezone used by the server is irrelevant.

Also, please note that time conversions are often performed by the SQL Client based upon the locale of the computer that is running the SQL Client. This can often lead to confusion because the time seen in output within the SQL client does not actually match the times stored in columns. (A good way to test this is to cast the field into a text field, to see the 'raw' value in the field without it being converted by the SQL client.)

I worked in a company that used to set their server to the timezone where the company was located, but as the company grew bigger and they had servers in multiple locations, it became a problem. Thus, it can be better to keep all computers in UTC and specifically convert times when they are being displayed.

How to change the server time zone without affecting already inserted data?

I have a web application created using ReactJS , NodeJS and Mongo DB on windows. And I am facing issues while deploying the same application on a Linux Server in AWS. Is there any changes to be considered while deploying such?

Is there any changes that needs to be done for the code? Does the path declaration change on the config file?

getting such errors? ENOENT: no such file or directory, stat '/home/ec2-user/Project/Backend/Backend/client/build/index.html'"

ENOENT: no such file or directory, stat '/home/ec2-user/Project/Backend/Backend/client/build/index.html'"T

he above error there isn't usually any thing inside the code that needs to be changed. From the error you provided it seems that your build was not complete successful. it may happen because of some wrong import. when we work with multiple projects in the same ide it happens sometime. So you check if your files have any wrong import

ReactJS, NodeJS deployment issue on linux server where application was coded in windows

I collect more than 300 urls on seed.txt that should be crawled by nutch, but approximately 80 nutch did not crawl. I controlled these sites and find out that most of these sites has allowed to crawl in robots.txt by:

Why nutch doesn't crawl these sites? Is there a possibility to fix this behavior?

nutch does not crawl sites that allows all crawler by robots.txt

I latterly used keycloak as an authorisation server for my software that manipulate some form of workspaces, so i created a useful resource in keycloak for every workspace and assigned users to it the use of keycloak console management. I'm wondering if there may be a a few form of endpoint in keycloak api or every other manner to get the wide variety of customers assigned to a resource.I

Keycloak does not have a built-in endpoint in its API to directly retrieve the number of users assigned to a specific resource (in your case, the workspace). However, you can achieve this by using Keycloak's Admin REST API in combination with some additional logic.

Get the list of users assigned to the resource (workspace).

To get the list of users assigned to a specific resource (workspace), you can use the following API endpoint:

GET /{realm}/clients/{client-id}/protocol/openid-connect/token

This endpoint returns an access token that you can use to authenticate subsequent requests. Replace {realm} with your Keycloak realm name and {client-id} with the ID of the client representing your resource (workspace).

Once you have the access token, you can use it to request the list of users associated with the client (resource/workspace):

Again, replace {realm} with your Keycloak realm name and {client-id} with the ID of the client representing your resource (workspace). This will give you a list of users assigned to that specific resource.

Next, you need to count the number of users in the response to get the total number of users assigned to the resource.

Number of users in one resource Keycloak

Hey someone can please help me out to solve this problem how can I trigger this from my java code application:(

First, you’ll need to install Jenkins on your developer machine or on a server. Download the desired distribution from the "https://www.jenkins.io/download/"page.

For pipeline definitions we have two options:

Defining a pipeline script in the Jenkins job that can be edited on-the-fly.

then go through this link "https://bmuschko.com/blog/jenkins-build-pipeline/"

How can i trigger the build of a pipeline from a script in my  java code application ?

To extract a database from SQL Server and load it into HDFS using NiFi, follow these condensed steps:

  a. ExecuteSQL: Connect to SQL Server and execute the desired SQL query.

  b. ConvertAvroToJson: Convert Avro data to JSON format.

  c. PutHDFS: Store the extracted data in HDFS.

3. Connect the processors to create a flow: Connect ExecuteSQL to ConvertAvroToJson, and Connect ConvertAvroToJson to PutHDFS.

4. Configure properties: Provide SQL Server connection details and SQL query for ExecuteSQL. Specify destination HDFS directory for PutHDFS.

5. Start the flow: Begin the NiFi flow to extract the data, convert it to JSON, and store it in HDFS.

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