A Comprehensive Guide to Using PuTTY for SSH into Linux
Mar 15, 2025 am 10:22 AM
Securely connect to a remote Linux server with PuTTY, whether you are an experienced developer or a beginner, PuTTY is a reliable tool. This article will guide you on how to connect to a Linux server via Secure Shell Protocol (SSH) on a Windows operating system.
Introduction to PuTTY
PuTTY is an open source and free Windows SSH client. It allows users to remotely access the computer network and run commands as if they were sitting in front of a terminal. It is a multi-functional tool that is widely used in network management, software development and other IT-related fields.
Download and install PuTTY
Getting started with PuTTY is very easy. Visit the official PuTTY download page and select the version that suits your Windows operating system (it is recommended to choose the latest stable version). After downloading the installation program, run it and follow the prompts to install PuTTY.
Configure PuTTY for SSH connection
Before you establish an SSH connection, you need to collect some important information: the IP address or host name of the Linux server you want to connect to, the port number, and your username.
Open PuTTY and you will see a configuration window. Under Session, in the Host Name (or IP Address) field, enter the IP address or host name of the Linux server. Make sure the Port field is set to 22 (default SSH port).
Under Connection Type, select SSH and go to the Saved Sessions field. Enter a name for this connection configuration for future use. When finished, click Save to save these settings. This way, you don't need to enter these details every time you connect.
Start SSH connection
After saving the session, you can connect. Select the saved session and click "Open". A new window with the console interface will open and you will be prompted for a username. Enter the username of the Linux server. Press "Enter" and you will be prompted to enter your password. Enter your password and press Enter again. Remember that the cursor will not move when entering a password; this is a standard security feature.
Handle PuTTY security alerts
When the first connection is established, PuTTY will display a security alert to confirm the authenticity of the server. This alert prevents potential man-in-the-middle attacks. PuTTY will display the server's SSH key fingerprint, which you should compare with the Linux server's fingerprint. If the fingerprint matches, click Yes to add the server's host key to PuTTY's cache. If this alert pops up in subsequent sessions, it may indicate that the security of the server has been compromised.
in conclusion
In short, PuTTY is a powerful and versatile tool for accessing and managing Linux servers from a Windows environment. With this tool in hand, you can not only gain insight into how to navigate remote servers, but also ensures that every connection is secure. Continue to explore PuTTY's advanced features to further enhance your network management and development skills.
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