keychain 命令

常用示例

说明

keychain is a front-end to ssh-agent and gpg-agent that manages long-running agent processes across login sessions. Rather than starting a new agent each time a shell is opened, keychain checks for an existing agent, reuses it if found, and only starts a new one when necessary, storing the agent's environment variables in files under `~/.keychain` so any shell can inherit them. This approach means you only need to enter your passphrase once after a reboot, and all subsequent terminal sessions, cron jobs, and scripts can use the cached keys without further prompting. The tool supports managing both SSH and GPG keys simultaneously via the `--agents` flag and outputs shell-evaluable commands that set the appropriate `SSH_AUTH_SOCK` and `GPG_AGENT_INFO` environment variables.

参数

--eval

Output shell eval commands.

--agents _LIST_

Agent types (ssh, gpg).

--clear

Clear cached keys.

-q, --quiet

Suppress output.

-l, --list

List cached keys.

--noask

Set up agent files but do not prompt to add keys if not already loaded.

--stop _which_

Kill agent processes. Values: mine (keychain's agents), others, or all.

--timeout _MINUTES_

Set a timeout in minutes for identities added to ssh-agent.

--nogui

Disable SSH_ASKPASS, forcing ssh-add to prompt on the terminal.

--ignore-missing

Suppress warnings if specified keys cannot be found.

--help

Display help information.