How to Change/Replace New Battery for UPS SANTAK 650VA



Introduction:
UPS is electric device that used for store power to other electric devices.
For UPS 650VA, mostly it used for backup electricity to computer, small server, router or switch (IT devices).
After used a long time, battery in UPS will be failed. At this time, UPS can’t operate normally or can’t turn on.

Solutions:
My advice is that you should buy new UPS. However, if you don’t want to buy new, you can change new battery for UPS (if mainboard is good & no problem).
In this article & video as below, I will guide you: how to change new battery for UPS 650VA.

How to Do:
Please see detail guide video as below to change new battery for UPS:



As guide video, to replace new battery for UPS we have 5 steps:
Step 1: Remove screws on UPS plastic casing.
Step 2: Remove the plastic cover of the UPS. Unplug 2 wires (black & red) connection between mainboard & old battery.
Step 3: Remove old battery, replace by new battery (already prepared)
Step 4: Reinstall everything as it was at the beginning
Step 5: Check power, specification on new battery before start UPS. Finish.

Conclusion:
Above is the whole battery replacement guide for UPS. If you have any questions, please comment below. We will discuss and give the best answer. Thank you everyone.

How to Fix "Aw Snap!" Crash in Google Chrome Version 78. Can't Open Any Pages On Windows 10



Introduction:
After you upgraded Google Chrome to version 78. You couldn’t use & open any pages on Google Chrome. In this article, I will guide you how to fix this issue.

How to Do:
Please see detail guide video as below to fix error "AwSnap!" Crash in Google Chrome Version 78



As guide video, to troubleshoot this problem:
Step 1: Troubleshoot Google Chrome via Program Compatibility Troubleshooter function on Control Panel.
Step 2: Re-install Compatibility tab on Google Chrome.

Conclusion:
Very easy right? With 2 steps, you can use Google Chrome normally. If you have any questions, please comment below. We will discuss and give the best answer. Thank you everyone.

How to Check/Test Status Keyboard On Laptop or PC

On


Introduction:
In this article, I will introduce you how to check or test status of keyboard on your PC or Laptop very easy.

How to Do:
Please see detail guide video as below to test keyboard on Laptop or PC



As guide video, to enable Java Script we need:
  • Step 1: Access website to check as: keyboardtester.com, keyboardchecker.com, keyboardtester.co
  • Step 2: Type any key on your keyboard. In particular, the keys you use are difficult.
  • Step 3: If the program shows green (borders around the key), the status is good. If not, then that key is having problems.
Conclusion:
Very easy right? With 3 steps, you test keyboard on Laptop or PC. If you have any questions, please comment below. We will discuss and give the best answer. Thank you everyone.

How To Enable/Turn On Java Script In Mozilla Firefox Updated 2019



Introduction:
In this article, I will guide you how to enable/turn on Java Script in Mozilla Firefox.
Normally, this function will automatically turn on. However, for some reason it was turned off. In this video, when I log into Gmail. And being told Java Script has been turned off. I can no longer login to Gmail

How to Do:
Please see detail guide video as below to turn on Java Script in Mozilla Firefox.


As guide video, to enable Java Script we need:
  • Step 1: Access to configuration function on Firefox. By typing the following address: “about:config”
  • Step 2: Type "java script" keyword on search box. you find to "javascript.enable" preference name.
  • Step 3: Change value from “false” to “true”.

Conclusion:
With 3 steps, you can fix this problem. If you have any questions, please comment below. We will discuss and give the best answer. Thank you everyone.

How to Fix Error "Your screen resolution is below the minimum required 1024 x 768" On Premiere Pro


Introduction:
In this article, I will guide you how to fix error with message alert:
"Your screen resolution is below the minimum required 1024 x 768.  Please increase your screen resolution or adjust the DPI scaling setting in your Display preference to a smaller size."
When you opened Premiere Pro, this message will be show on your desktop.

How to Do:
Please see detail guide video as below to fix this message alert.

As guide video, we only change setting of Scale and layout (Change the size of text). From 150% to 125%.

Conclusion:
A little trick, but helps you fix when you're using Premiere Pro apps. If you have any questions, please comment below. We will discuss and give the best answer. Thank you everyone.

How to Redirect www to Non-www or Non-www to www for Apache2 on Ubuntu 18.04 LTS


Introduction:

Prerequisites:
  • One Ubuntu 18.04 LTS server that already installed Apache2. You can refer to the article as How to Install LAMP on Ubuntu 18.04 LTS.
  • A fully registered domain name. This domain name has been configured DNS.
  • Be sure that you have a virtual host file for your domain. This video tutorial will use /etc/apache2/sites-available/dan14.vn.conf as an example (dan14.vn – this is my domain name).

Please see the video tutorial details below to help you redirect www to Non-www with Apache on Ubuntu 18.04 LTS:



So, redirect www to Non-www with Apache on Ubuntu 18.04 LTS that there are 3 basic steps as follows:
  • Step 1 — Enable Rewrite Module
  • Step 2 — Enable .htaccess Files
  • Step 3 — Configure Rewrite Module
Code templates <used to configuring>
+ DocumentRoot - add to Apache configuration
 <Directory /var/www/html>
    Options Indexes FollowSymLinks MultiViews
    AllowOverride All
    Order allow,deny
    allow from all
 </Directory>

+ Option 1: Redirect www to non-www
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

+ Option 2: Redirect non- RewriteEngine On
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

Conclusion:
In this tutorial, we already completed redirect www toNon-www with Apache on Ubuntu 18.04 LTS. If you have any questions, please comment below. We will discuss and give the best answer. Thank you everyone.

Related Article:
📂  How To Install LAMP On UBUNTU 18.04 LTS Google Cloud:
↪️ Video: How To Install LAMP On UBUNTU 18.04 LTS Google Cloud
↪️ Article:

📂  How To Install HTTPS to Secure Apache with Let's Encrypt TLS/SSL Certificates on UBUNTU 18 04LTS:
↪️ Video: How To Install SSL Certificates on UBUNTU 18 04LTS
↪️ Article: How To Install HTTPS to Secure Apache with Let's Encrypt TLS/SSL Certificates on UBUNTU 18.04LTS


How To Install HTTPS to Secure Apache with Let's Encrypt TLS/SSL Certificates on UBUNTU 18.04LTS



Introduction:
Let’s Encrypt is a free, automated, and open certificate authority (CA), run for the public’s benefit. It is a service provided by the Internet Security Research Group (ISRG).
The key principles behind Let’s Encrypt are:
  • Free: Anyone who owns a domain name can use Let’s Encrypt to obtain a trusted certificate at zero cost.
  • Automatic: Software running on a web server can interact with Let’s Encrypt to painlessly obtain a certificate, securely configure it for use, and automatically take care of renewal.
  • Secure: Let’s Encrypt will serve as a platform for advancing TLS security best practices, both on the CA side and by helping site operators properly secure their servers.
  • Transparent: All certificates issued or revoked will be publicly recorded and available for anyone to inspect.
  • Open: The automatic issuance and renewal protocol will be published as an open standard that others can adopt.
  • Cooperative: Much like the underlying Internet protocols themselves, Let’s Encrypt is a joint effort to benefit the community, beyond the control of any one organization.
(Reference source: Let's Encrypt)

In this article, I will install Let’s Encrypt for Apache2 onUbuntu 18.04LTS. And setup SSL/TLS certificate to renew automatically.
We recommend creating new Apache virtual host files for each domain because it helps to avoid common error & conflicts in during installation

Prerequisites:
  1. One Ubuntu 18.04 LTS server that already installed Apache2. You can refer to the article as How to Install LAMP on Ubuntu 18.04 LTS.
  2. A fully registered domain name. This domain name has been configured DNS.
  3. Be sure that you have a virtual host file for your domain. This video tutorial will use /etc/apache2/sites-available/dan14.vn.conf as an example (dan14.vn – this is my domain name).

Please see the video tutorial details below to help you Install SSL Certificates on UBUNTU 18.04LTS:



So, to install SSL certificate on Ubuntu 18.04 LTS that there are 5 basic steps as follows:
  • Step 1 — Installing Certbot
  • Step 2 — Set Up the SSL Certificate
  • Step 3 — Allowing HTTPS Through the Firewall
  • Step 4 — Obtaining an SSL Certificate
  • Step 5 — Verifying Certbot Auto-Renewal

Conclusion:
In this tutorial, we already completed installing SSL certificate for Apache on Ubuntu 18.04 LTS. And this certificate - Let’s Encrypt will renew automatically.  If you have any questions, please comment below. We will discuss and give the best answer. Thank you everyone.

Học UBUNTU – Hướng Dẫn Cài Đặt LAMP (Apache, MySQL, PHP) Cho UBUNTU 18.04 LTS Trên Google Cloud.


Để chạy một trang web trên VPS Ubuntu 18.04 của bạn, bạn sẽ cần cài đặt một nhóm phần mềm nguồn mở bao gồm Apache, PHP và MySQL. Các ứng dụng này rất hữu ích khi chạy các trang web động dựa trên cơ sở dữ liệu và ngôn ngữ lập trình từ phía máy chủ.

  • Apache là một phần mềm máy chủ web chất lượng cao, nhanh, phổ biến nhất kể từ năm 1996.
  • PHP (Hypertext Pre Processor) là ngôn ngữ lập trình đa năng được thiết kế cho các phát triển web từ năm 1994.
  • MySQL là một máy chủ cơ sở dữ liệu quan hệ được thiết kế bởi Oracle và được sử dụng bởi các trang web có quy mô lớn: Google, Youtube và Twitter. Sự phát triển của nó bắt đầu vào năm 1994.
Với bản phân phối Linux như Ubuntu 18.04, nó hoàn toàn có thể tạo ra máy chủ LAMP (Linux Apache, MySQL và PHP) đầy đủ chức năng.

Trong hướng dẫn này, chúng tôi sẽ chỉ cho bạn cách cài đặt Apache, MySQL và PHP trên máy chủ Ubuntu 18.04 của bạn.



Qua video trên, các bước cơ bản để cài đặt như sau:
1.Tạo VPS trên Google Cloud Platform
1.Truy cập vào máy chủ UBUNTU qua SSH
2.Cài đặt gói Apache2
3.Tạo thư mục chứa website.
4.Thêm domain (Virtual host) vào Apache2.
5.Cài đặt MySQL
6.Cài đặt PHP
Quá dễ dàng đúng không. Vậy bạn có thể  tự tạo cho 1 host riêng cho website của mình rồi. Hãy bình luận ở dưới nếu có thắc mắc hoặc đóng góp nào nhé. Cám ơn các bạn đã theo dõi.

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