Section: systemd-ask-password (1)
:systemd-ask-password [OPTIONS...] [MESSAGE]
- may be used to query a system password or passphrase from the user, using a question message specified on the command line. When run from a TTY it will query a password on the TTY and print it to standard output. When run with no TTY or with --no-tty it will query the password system-wide and allow active users to respond via several agents. The latter is only available to privileged processes.
The purpose of this tool is to query system-wide passwords -- that is passwords not attached to a specific user account. Examples include: unlocking encrypted hard disks when they are plugged in or at boot, entering an SSL certificate passphrase for web and VPN servers.
Existing agents are: a boot-time password agent asking the user for passwords using Plymouth; a boot-time password agent querying the user directly on the console; an agent requesting password input via a wall?(1) message; an agent suitable for running in a GNOME session; a command line agent which can be started temporarily to process queued password requests; a TTY agent that is temporarily spawned during systemctl?(1) invocations.
Additional password agents may be implemented according to the m[blue]systemd Password Agent Specificationm.
The following options are understood:
- Specify an icon name alongside the password query, which may be used in all agents supporting graphical display. The icon name should follow the m[blue]XDG Icon Naming Specificationm.
- Specify the query timeout in seconds. Defaults to 90s. A timeout of 0 waits indefinitely.
- Never ask for password on current TTY even if one is available. Always use agent system.
- If passed, accept cached passwords, i.e. passwords previously typed in.
- When used in conjunction with --accept-cached accept multiple passwords. This will output one password per line.
- Print a short help text and exit.
- systemd Password Agent Specification
- XDG Icon Naming Specification