What it does
OpenSSH is a suite for encrypted remote access and related network operations. Its tools include `ssh` for remote login, `scp` and `sftp` for file transfer, `ssh-keygen` for creating key pairs, and forwarding options for secure tunnels. The portable release is intended for systems other than OpenBSD. OpenSSH's component licenses are BSD-style or more permissive, as summarized by the project.
Reach a machine you already administer
OpenSSH is useful after a server or development host is provisioned and accepts SSH connections. A typical workflow is to create a key pair with ssh-keygen, install the public key on the remote account through the host's authorized process, then connect with ssh user@host. The OpenBSD manual explains identity-file selection and the OpenSSH manual index also links to scp, sftp, the authentication agent, and key-management commands. Use a named host entry in the client configuration when the same connection needs a non-default port or identity file. OpenSSH handles transport and authentication; it does not create the remote machine or decide what permissions the remote account should have. The official portable-source license file summarizes its components as BSD-licensed or more permissive and includes component-specific notices.
Strengths
- The suite covers remote shells, file transfer, key generation, agents, and tunneling rather than only one login command.
- The official manual pages document client configuration and identity-file options.
- The portable source is available under BSD-style or more permissive component licenses.
Watch out for
- A remote host and valid account credentials or key setup are prerequisites; OpenSSH does not provision them.
- Secure operation depends on choosing appropriate host, identity, and forwarding settings for the connection.
Best for
- Developers and administrators connecting to remote Linux, Unix, or other SSH-enabled hosts.
- Automated file transfer or tunneling between systems that already have SSH access configured.
Sources
- OpenSSH (Oct 25, 2026)
- OpenSSH: Manual Pages (Oct 25, 2026)
- ssh(1) - OpenBSD manual pages (Oct 25, 2026)
- LICENCE | openssh/openssh-portable (Oct 25, 2026)