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Install Java 17 LTS (JDK 17 ) On Debian 11 - Different ways to perform it ?

This article covers how to install the latest OpenJDK, and by extension Java 17 on your Debian 11 Bullseye system. In fact, JDK 17 (JDK 17) has brought forward new language enhancements, updates to the libraries, support for new Apple computers, removals and deprecations of legacy features, and work to ensure Java code written today will continue working without change in future JDK versions.

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Install AnyDesk On Ubuntu 20.04 / 18.04 - Step by Step Process ?

This article covers methods to Install AnyDesk on Ubuntu 20.04/18.04 Linux.

AnyDesk is a remote server management tool which provides powerful Linux-based connectivity for smooth and seamless remote access to any computer. 

AnyDesk can be used comfortably for both individual, teams and in professional organizations offering remote support to customers.


To Install AnyDesk on Ubuntu:

1. Start by ensuring your system is updated.

$ sudo apt update
$ sudo apt -y upgrade

2. Import AnyDesk GPG key for signing APT packages.

$ wget -qO - https://keys.anydesk.com/repos/DEB-GPG-KEY | sudo apt-key add -

3. Then add AnyDesk repository content to your Ubuntu system.

$ echo "deb http://deb.anydesk.com/ all main" | sudo tee /etc/apt/sources.list.d/anydesk-stable.list

4. Finally update apt cache and install the latest release of AnyDesk on Ubuntu.

$ sudo apt update
$ sudo apt install anydesk

5. After installation, use the Desktop Applications launcher to start AnyDesk on Ubuntu.

$ anydesk

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Flush DNS Cache on Ubuntu 20.04 - Step by Step process ?

This article covers how to flush the DNS cache on Ubuntu. If the sites are not loading properly or you are receiving outdated sites, try to flush the DNS cache to see if the issue resolves. 

Remember, after the DNS cache is flushed, sites will first load slightly slower. 

But once the DNS cache is re-populated, sites will be loaded faster.


Facts about flushing DNS cache on Ubuntu:

1. DNS cache is a temporary database that stores information about previous DNS lookups. 

2. Whenever you visit a website, your OS and web browser will keep a record for the domain and the corresponding IP address. 

3. Flushing DNS cache eliminates the need for repetitive queries to the remote DNS servers and allows your OS or browser to resolve the website's URL quickly.


How to use dns-clean to flush DNS-Cache ?

You can clear the DNS cache is by starting the dns-clean utility. Run the following command in your Terminal to do so:

$ sudo /etc/init.d/dns-clean start

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Methods to uninstall programs from Ubuntu 20.04 LTS ?

This article will guide you on different methods to uninstall a #program from your Ubuntu 20.04 #system. You can #unininstall a package via a graphical #software manager and also through the command line. 

You can safely use sudo apt-get remove --purge application or sudo apt-get remove applications. When you use the purge flag, it simply removes all config files too.

To remove packages from Ubuntu system:

1. Click on the Ubuntu Software icon in the Activities toolbar; this will open the Ubuntu Software manager through which you can search for, install and uninstall software from your computer. 

2. From the list of #applications, look up for the one you want to uninstall and then click the Remove button against it.

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Steps to Install and Configure Nginx on Ubuntu Linux 18.04 LTS?

This tutorial will guide you on how to get Nginx server installed and configured on an Ubuntu Linux 18.04 LTS server.

Nginx is one of the most popular web servers in the world and is responsible for hosting some of the largest and highest-traffic sites on the internet. It is more resource-friendly than Apache in most cases and can be used as a web server or reverse proxy.


Nginx Configuration Files Structure

  • All configuration files are located in the /etc/nginx/ directory.
  • Nginx main configuration file is at /etc/nginx/nginx.conf.
  • It's best practice to create a separate configuration file of each domain for better maintainability.
  • New server blocks (configuration file) of each domain should be stored in /etc/nginx/sites-availabledirectory. You need to make symlink of these configuration files at /etc/nginx/sites-enabled to take in used by Nginx.
  • Activating server blocks is done by creating a symlink (a pointer) from the configuration file sites in a /etc/nginx/sites-enabled directory to the sites-enabled directory.
  • The default server web root directory is /var/www/html
  • It's best practice to to follow standard naming convention. Nginx server block files name should as domain name and must end with .conf extension. For example, your domain name is example.com then server block file name should example.com.conf
  • Nginx log files (access.log and error.log) are located in the /var/log/nginx/ directory. It's also recommended to have a different access and error log files for each server block.

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