SSH-AGENT(1) General Commands Manual SSH-AGENT(1) (NAME) ssh-agent - OpenSSH (SYNOPSIS) ssh-agent [-c | -s] [-DdTU] [-a bind_address] [-E fingerprint_hash] [-O option] [-P allowed_providers] [-t life] ssh-agent [-TU] [-a bind_address] [-E fingerprint_hash] [-O option] [-P allowed_providers] [-t life] command [arg ...] ssh-agent [-c | -s] -k ssh-agent -u ssh-agent -V (DESCRIPTION) ssh-agent . ssh(1) . : -a bind_address UNIX bind_address. $HOME/.ssh/agent/s.* . -c C-shell . SHELL csh . -D . ssh-agent (fork) . -d . ssh-agent (fork) . -E fingerprint_hash () . : "md5" "sha256". "sha256" . -k (kill) ( SSH_AGENT_PID ). -O option ssh-agent. : allow-remote-pkcs11, no-restrict-websafe websafe-allow. allow-remote-pkcs11 ssh-agent (forwarded) PKCS#11 FIDO . . (remote) ssh-agent ssh(1) . no-restrict-websafe ssh-agent FIDO . ssh-agent FIDO "ssh:" ssh(1) ssh-keygen(1) . FIDO . websafe-allow : "websafe-allow=ssh:*,example.org,*.example.com" PATTERNS ssh_config(5) . -P allowed_providers FIDO PKCS#11 -S -s ssh-add(1) . . "/usr/lib*/*,/usr/local/lib*/*" . PATTERNS ssh_config(5) . -s Bourne shell . SHELL csh . -T $TMPDIR/ssh-XXXXXXXXXX/agent. $HOME/.ssh/agent/s.* . -t life . sshd_config(5) . ssh-add(1) . () . -U ssh-agent $HOME/.ssh/agent/ . -u ssh-agent $HOME/.ssh/agent/ . ssh-agent . command [arg ...] ( ) . . -V . . X ssh-agent . ssh-agent xterm &. . . ssh-agent eval `ssh-agent -s`. ssh(1) . ssh-agent (socket activation) systemd . ssh-agent . ssh-agent -d -D -a LISTEN_FDS LISTEN_PID . . ssh-add(1) ssh(1) AddKeysToAgent ssh_config(5) . ssh-agent ssh(1) . ssh-add(1) ssh-agent . ssh-agent -A ssh(1) ( ) . : SSH . ssh-agent SIGUSR1 . (ENVIRONMENT) SSH_AGENT_PID ssh-agent (PID) . SSH_AUTH_SOCK ssh-agent UNIX . (root) . (FILES) $HOME/.ssh/agent/s.* UNIX . . . (SEE ALSO) ssh(1), ssh-add(1), ssh-keygen(1), ssh_config(5), sshd(8) (AUTHORS) OpenSSH ssh 1.2.12 Tatu Ylonen . Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo de Raadt Dug Song OpenSSH . Markus Friedl SSH 1.5 2.0 . Linux 6.12.107+deb13-amd64 May 27, 2026 Linux 6.12.107+deb13-amd64