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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).
The System Security Services Daemon (SSSD) is software originally developed for the Linux operating system (OS) that provides a set of daemons to manage access to remote directory services and authentication mechanisms. [1] The beginnings of SSSD lie in the open-source software project FreeIPA (Identity, Policy and Audit). [2]
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).
This is a list of POSIX (Portable Operating System Interface) commands as specified by IEEE Std 1003.1-2024, which is part of the Single UNIX Specification (SUS). These commands can be found on Unix operating systems and most Unix-like operating systems.
systemd is a software suite that provides an array of system components for Linux [7] operating systems. The main aim is to unify service configuration and behavior across Linux distributions. [8] Its primary component is a "system and service manager" — an init system used to bootstrap user space and manage user processes.
Linux HP-UX iOS Maemo macOS Solaris OpenSSH [b] The OpenBSD project 1999-12-01 [c] AIX 9.9 [6] 2024-09-19 BSD: Android BSD Cygwin Linux HP-UX iOS Maemo OpenVMS macOS Solaris Windows z/OS PuTTY: Simon Tatham: 1999-01-22 BSD 0.83 [7] 2025-02-08 MIT: Linux macOS Solaris Windows SecureCRT: VanDyke Software 1998–06 Linux 9.3.1 [8] 2022-12-06 ...
Components of some Linux desktop environments that are daemons include D-Bus, NetworkManager (here called unetwork), PulseAudio (usound), and Avahi.. In multitasking computer operating systems, a daemon (/ ˈ d iː m ən / or / ˈ d eɪ m ən /) [1] is a computer program that runs as a background process, rather than being under the direct control of an interactive user.
OpenSSH (also known as OpenBSD Secure Shell [a]) is a suite of secure networking utilities based on the Secure Shell (SSH) protocol, which provides a secure channel over an unsecured network in a client–server architecture.