How to Install and Set PATH for Java

Amrendra Singh — Sat, 21 Feb 2026 16:11:10 +0000

1). For Windows

Step 1: Download Java

Visit the Java Download Page: Link
Select the Latest Java Development Kit (JDK)[JDK 25]LTS for Windows.
Download the installer (.exe file).

Step 2: Install Java

Run the Downloaded .exe file.
Follow the installation wizard steps: Accept the license agreement. Choose an installation directory (default is usually fine).
Click Finish

Step 3: Set the PATH Environment Variable

Open the Start Menu and Search for Environment Variables
Click Edit the system environment variables.
In the System Properties window, Click the Environment Variables button.
Under System Variables, find and select the Path variable, then click Edit. If not available create one
Add the following to the list of paths: C:\Program Files\Java\jdk<version>\bin (Replace <version> with the installed JDK version number).
Click OK to save changes.

Step 4: Verify Installation.

Open Command Prompt.
Run the command: java -version

If Java is installed correctly, it will display the installed version.

2). For macOS

Step 1: Download Java

Visit the Java Download page: Link
Select the latest JDK for macOS.
Download the .dmg file.

Step 2: Install Java

Open the downloaded .dmg file.
Follow the installation prompts:
Drag the Java installer to the Applications folder.
Once the installation is complete, Java will be installed in /Library/Java/JavaVirtualMachines/.

Step 3: Set the PATH Environment Variable

Open the Terminal application.
Edit the ~/.zshrc or ~/.bash_profile file (depending on your shell): nano ~/.zshrc
Add the following line at the end of the file: export PATH=$PATH:/Library/Java/JavaVirtualMachines/jdk <version>/Contents/Home/bin (Replace <version> with the installed JDK version).
Save the file and reload it: source ~/.zshrc

Step 4: Verify Installation

Open the Terminal.
Run the command: java -version

If Java is installed correctly, it will display the installed version.

3). For Linux

Step 1: Download Java

Open your browser and visit the Java Download page: Link
Select the latest JDK for Linux.
Download the .tar.gz file.

Step 2: Install Java

Open the Terminal.
Navigate to the directory where the .tar.gz file was downloaded: cd /path/to/downloaded/file
Extract the file: tar -xvzf jdk-<version>.tar.gz
Move the extracted folder to /usr/local/: sudo mv jdk-<version> /usr/local/

Step 3: Set the PATH Environment Variable

Open the ~/.bashrc or ~/.zshrc file: nano ~/.bashrc
Add the following line at the end of the file: export PATH=$PATH:/usr/local/jdk-<version>/bin
Save the file and reload it: source ~/.bashrc

Step 4: Verify Installation

Open the Terminal.
Run the command: java -version

If Java is installed correctly, it will display the installed version.

Basics & History of Linux

Amrendra Singh — Wed, 04 Feb 2026 19:41:57 +0000

UNIX Project started in -
1964 -> Bell Laboratory (New Jersey)
1969 -> Project was withdraw, but Dennis Ritchie and Ken Thompson were two persons who are involved with the project interested to keep going after long of trials and errors, they have built a Operating system(OS) named as originally UNICS (Uniplexed Information & Computing Services) which is open-source and free to use for all.
1975 -> Version of UNICS(or Unix) was launched with UNIX v6 which got lot of attention and recognition on global scale and become popular in less-time.

After this revolution was started to give the professional services to users, companies started creating their own flavour of version of UNIX.

UNIX based OS by different organizations.
1). IBM created AIX
2). SUN created Solaris
3). Mac created MacOS
4). HP created UX

History behind creation of LINUX Operating System

In 1991, Linux Torvalds(Software Engineer) created and wrote the LINUX Operating system from Scratch by taking inspiration from UNIX and Andrew S. Tanenbaum (Computer Scientist) - He created a Operating system for children to share and guide the information which he named as - MINIX.

Linux is free and open-source use for all users for multi-tasking and multi-user support.

Many versions are released after wide adoption of this operating systems by different companies on regular basis with different user-cases.

Various Versions available - RHEL(provides services), Fedora(group or community), Debian, Ubuntu(widely adopted for Use), CentOS(Fast compared to other versions), Amazon Linux, Kali Linux(Mostly under for Hacking Purposes) etc.

Ways to operate an Operating System ->
1). CLI(Command Line Interface) based in which commands are being used to give instructions to computer to perform the tasks.
2). GUI(Graphical User Interface) based in which graphics based system is available to us to click and perform the tasks.

Linux is Kernel not an Operating System
Linux is a Kernel along with GNU can termed as Operating System
Linux(Kernel) + GNU -> OS

Linux is not a UNIX derivative. It was written from Scratch.

A Linux Distribution is the Linux kernel and a collection of software that together, creates an Operating System.

Advantages/Features of Linux ->

1). Open-Source
2). Secure
3). Simplified updates for all Installed Software
4). Light Weight
5). Supports Multi-user and Multi-Tasking
6). Multiple distributions - RedHat, Debian, Fedora

Linux - File System Hierarchy in Detail

/home -> Home directory for other users.
/root -> It is home directory for root user.
/boot -> It contains bootable files for Linux.
/etc -> It contains all configuration files.
/usr -> by default software are installed in this directory.
/bin -> It contains commands used by all users.
/sbin -> It contains commands used by only root user.
/opt -> optional application software packages.
/dev -> essential device files, this include terminal devices, USBs or any device attached to the systems.

POST - Power on Self Test.

DEV Community: Amrendra Singh

How to Install and Set PATH for Java

Step 1: Download Java

Step 2: Install Java

Step 3: Set the PATH Environment Variable

Step 1: Download Java

Step 2: Install Java

Step 3: Set the PATH Environment Variable

Step 4: Verify Installation

Step 1: Download Java

Step 2: Install Java

Step 3: Set the PATH Environment Variable

Step 4: Verify Installation

Basics & History of Linux