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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]
SSH is typically used to log into a remote computer's shell or command-line interface (CLI) and to execute commands on a remote server. It also supports mechanisms for tunneling , forwarding of TCP ports and X11 connections and it can be used to transfer files using the associated SSH File Transfer Protocol (SFTP) or Secure Copy Protocol (SCP).
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.
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.
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.
Note that these methods prevent the process from being sent a 'stop' signal on logout, but if input/output is being received for these standard I/O files (stdin, stdout, or stderr), they will still hang the terminal. [1] See Overcoming hanging, below. nohup is often used in combination with the nice command to run processes on a lower priority.
Users typically interact with a Unix shell using a terminal emulator; however, direct operation via serial hardware connections or Secure Shell are common for server systems. All Unix shells provide filename wildcarding , piping , here documents , command substitution , variables and control structures for condition-testing and iteration .
SecureCRT is a GUI-based telnet client and terminal emulator originally called CRT. It was first released in the autumn of 1995 by VanDyke Software. [6] [7] Originally released as a premium version of CRT with support for SSH encryption, SecureCRT later absorbed the CRT product entirely. The program is part of a line of networking software ...