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PuTTY user manual (copy from 2022) PuTTY (/ ˈ p ʌ t i /) [4] is a free and open-source terminal emulator, serial console and network file transfer application. It supports several network protocols, including SCP, SSH, Telnet, rlogin, and raw socket connection. It can also connect to a serial port. The name "PuTTY" has no official meaning. [5]
The operating systems or virtual machines the SSH clients are designed to run on without emulation include several possibilities: . Partial indicates that while it works, the client lacks important functionality compared to versions for other OSs but may still be under development.
WinSCP (Windows Secure Copy) [3] is a file manager, SSH File Transfer Protocol (SFTP), File Transfer Protocol (FTP), WebDAV, Amazon S3, and secure copy protocol (SCP) client for Microsoft Windows. The WinSCP project has released its source code on GitHub under an open source license, while the program itself is distributed as proprietary freeware.
Client-side terminal emulation transmits the raw terminal output from the SSH server directly to the client, which has the advantage of offloading the process of translating terminal output into HTML onto the client. However, it can be limited by the capabilities of JavaScript and can use a significant amount of the client's CPU and memory.
Secure Shell (SSH) is a protocol allowing secure remote login to a computer on a network using public-key cryptography.SSH client programs (such as ssh from OpenSSH) typically run for the duration of a remote login session and are configured to look for the user's private key in a file in the user's home directory (e.g., .ssh/id_rsa).
Mintty is based on the terminal emulation and Windows frontend parts of PuTTY, but improves on them in a number of ways, [3] particularly regarding xterm compatibility. It is written in C. The POSIX API provided by Cygwin is used to communicate with processes running within mintty, while its user interface is implemented using the Windows API.
The Cygwin DLL contains a console driver that emulates a Unix-style terminal within the Windows console. Cygwin's default user interface is the bash shell running in the Cygwin console. The DLL also implements pseudo terminal (pty) devices. Cygwin ships with a number of terminal emulators that are based on them, including mintty, rxvt/urxvt ...
Pseudoterminals as they are used by script unix command that records user's input for replaying it later.. In some operating systems, including Unix-like systems, a pseudoterminal, pseudotty, or PTY is a pair of pseudo-device endpoints (files) which establish asynchronous, bidirectional communication channel (with two ports) between two or more processes.