What is PuTTY?


PuTTY is a free program available on both Windows and Linux that supports various network protocols, including SSH, Telnet and Rlogin. Furthermore, it can connect directly to serial ports.

Primary applications for remote server administration in headless environments include software updates, configuration modifications and troubleshooting. It can also assist network engineers in configuring devices like routers and switches.

It supports SSH

PuTTY is an extremely useful program that enables users to easily connect to remote systems from their computers, while customizing their experience through features such as font size and colors, keyboard shortcuts and mouse behavior. Software designed for remote server administration on both Linux and Unix systems, but can also access network devices and communicate with serial ports. Free to download and install, it works seamlessly on Windows 10, 8, 7 and earlier versions. Once the download is complete, navigate to its location in File Explorer (Windows 10) or Windows Explorer (Windows 8 and earlier). Double-click to launch the installer, and follow its prompts for setting up PuTTY: select your destination folder and install additional features as necessary.

Once PuTTY is installed on your desktop computer, simply clicking its icon will launch it and bring up an easy configuration menu. Enter any host name or IP address you wish to connect with; in the Port field type in 22 as its default value; then in Authentication select username/password authentication or SSH keys before saving Session for future use.

Once connected to the remote system, anything you type will appear in a terminal window on your computer and responses from the server will also be visible in this Window. Once complete with your session, press Control-D to disconnect.

At first, when connecting to a new server, you might receive a security alert notifying you that its host key hasn’t been cached – this is normal and serves to verify whether you are connecting to what you believe it to be; it helps protect passwords and data security. However, if this warning keeps occurring regularly it could indicate man-in-the-middle attacks; to mitigate against such risks it’s wise to change your password frequently while keeping it complex to stay protected against such attacks.

It supports Telnet

PuTTY is a free and open source program that supports SSH and Telnet network protocols and serial ports, as well as serial console connections. Originally developed by Simon Tatham for Microsoft Windows but now supported across numerous operating systems. PuTTY can serve as a terminal emulator, serial console connection program or network file transfer program among other tasks.

At any point during a PuTTY session, any text you enter is transmitted directly to the server and any responses from it are displayed in its PuTTY window. Sessions end either when you exit a server’s command-line shell or press Ctrl+D; forcibly end them by closing terminal window. PuTTY supports many text-based applications and is popularly used to connect Linux servers from Microsoft OS computers.

PuTTY can store the last 200 lines you worked with on serial connections in its memory, even after pressing Ctrl-C to break them off and send a special signal to notify servers that you wish to break the connection. However, using this feature may pose risks because servers could respond by sending unwanted commands into your system.

Change Settings’ is an accessible way of customizing most aspects of a PuTTY session, enabling you to change terminal size, font style and actions of keypresses; adjust background and text colors; as well as some options that don’t make sense to change mid-session.

PuTTY goes beyond simply supporting SSH by connecting to other serial and X11 connections, providing useful support for debugging code by simulating serial port connections or managing SSH keys used for authentication – ideal features for developers working across various systems and networks.

It supports rlogin

PuTTY is a free program that makes remote log-in easy, both within a network and over the Internet. It supports various network protocols like SCP, SSH, Telnet and Rlogin2 (rlogin2). PuTTY runs on multiple operating systems including Windows, Linux, Mac OS X Unix-like OS’s mobile phones – even SSH/SFTP can make remote connections secure!

PuTTY features an easy interface where you can manage all of your session settings. From here, you can select either the host name or IP address, create and enter a password, as well as specifying ports as necessary. Furthermore, SSH authentication can also be enabled by providing either username + password OR private key file authentication details; additionally you can save and reopen configuration later if needed.

Once connected to a server, you can use a terminal window to type commands and receive responses from it. You can also use it to launch any text-based applications hosted on that server; your session ends when either exiting command-line shell on server or closing terminal window.

PuTTY comes equipped with several useful features that may come in handy, including its ability to run in full screen mode and use of mouse for copy and paste of text; clicking left button in terminal window selects single word while dragging can select rectangular area – you can press CTRL + V paste selected text! Plus you can even set custom color schemes, fonts and actions for certain keyboard keys!

One useful feature of PuTTY is its ability to tunnel local connections through its session, proving useful for those connecting regularly to specific servers or moving files from their computer onto those servers. Furthermore, this program can even be used as a file transfer mechanism from local machines directly.

PuTTY allows you to customize its behavior by choosing from its “Saved Sessions” list of profiles. Most users should stick with the default option; if needed, other customizations may be available as well. Using Change Settings menu you can access a reduced version of initial configuration box that enables adjusting most properties of current session.

It supports raw socket connection

PuTTY supports raw socket connection, enabling it to work with devices that do not support all SSH commands. This feature is especially helpful for kernel debugging or working with legacy devices like Cisco routers; raw socket connection uses a standard protocol for transmitting data across networks faster and requires less memory than other methods – plus, it is cross-platform compatible!

PuTTy allows you to select text from the screen and paste it into another program with ease. Simply double-clicking or triple-clicking with both buttons held down will select one or more words or sequence of words respectively; or hold down two buttons while triple-clicking with second click pressed for longer. Furthermore, PuTTY’s text selection functionality can also be customized so it always selects the first word it sees as well as multiple other options such as always selecting all words seen at once.

Another advantageous feature of PuTTY is its ability to save and load sessions later, which is especially helpful for testing different configurations. You can even create multiple sessions and load them simultaneously on different windows on the same computer. However, PuTTY has some restrictions. For instance, it does not feature an integrated file transfer client like PSCP and PSFTP and only supports command-line tools like these for file transfers.

PuTTY features an intuitive and straightforward user interface, with terminal emulation and configurability as its hallmark strengths. Furthermore, this free open-source software boasts support for numerous cryptographic algorithms as well as being available for Windows as well as Linux-based computers.

PuTTY is free, yet has some license restrictions that must be adhered to – the primary being it cannot be used for commercial use. Its license can be easily read on the project website; and you can always download its latest version there as well.

PuTTY can be installed easily and effortlessly on many Linux-based systems, including Ubuntu. Its Linux version looks similar to its Windows counterpart in terms of installation and usage; both feature public key authentication for added protection over password authentication alone; this tool can help create your private key using PuTTYgen tool.

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