trusty (1) systemd-ask-password.1.gz

Provided by: systemd_204-5ubuntu20.31_amd64 bug

NAME
       systemd-ask-password - Query the user for a system password


SYNOPSIS
       systemd-ask-password [OPTIONS...] [MESSAGE]


DESCRIPTION
       systemd-ask-password 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 STDOUT. 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 systemd Password Agent Specification[1].

       If a password is queried on a TTY the user may press TAB to hide the asterisks normally shown for each
       character typed. Pressing Backspace as first key achieves the same effect.


OPTIONS
       The following options are understood:

       -h, --help
           Prints a short help text and exits.

       --icon=
           Specify an icon name alongside the password query, which may be used in all agents supporting
           graphical display. The icon name should follow the XDG Icon Naming Specification[2].

       --timeout=
           Specify the query timeout in seconds. Defaults to 90s. A timeout of 0 waits indefinitely.

       --no-tty
           Never ask for password on current TTY even if one is available. Always use agent system.

       --accept-cached
           If passed accept cached passwords, i.e. passwords previously typed in.

       --multiple
           When used in conjunction with --accept-cached accept multiple passwords. This will output one
           password per line.


EXIT STATUS
       On success 0 is returned, a non-zero failure code otherwise.


SEE ALSO
       systemd(1), systemctl(1), plymouth(8), wall(1)


NOTES
        1. systemd Password Agent Specification
           http://www.freedesktop.org/wiki/Software/systemd/PasswordAgents

        2. XDG Icon Naming Specification
           http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html