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


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


   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 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

   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

   *   A boot-time password agent querying the user directly on the

   *   An agent requesting password input via a wall(1) message

   *   A command line agent which can be started temporarily to process
       queued password requests

   *   A TTY agent that is temporarily spawned during systemctl(1)

   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.


   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 XDG Icon Naming Specification[2].

       Specify an identifier for this password query. This identifier is
       freely choosable and allows recognition of queries by involved
       agents. It should include the subsystem doing the query and the
       specific object the query is done for. Example:

       Configure a kernel keyring key name to use as cache for the
       password. If set, then the tool will try to push any collected
       passwords into the kernel keyring of the root user, as a key of the
       specified name. If combined with --accept-cached, it will also try
       to retrieve such cached passwords from the key in the kernel
       keyring instead of querying the user right away. By using this
       option, the kernel keyring may be used as effective cache to avoid
       repeatedly asking users for passwords, if there are multiple
       objects that may be unlocked with the same password. The cached key
       will have a timeout of 2.5min set, after which it will be purged
       from the kernel keyring. Note that it is possible to cache multiple
       passwords under the same keyname, in which case they will be stored
       as NUL-separated list of passwords. Use keyctl(1) to access the
       cached key via the kernel keyring directly. Example:

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

       Echo the user input instead of masking it. This is useful when
       using systemd-ask-password to query for usernames.

       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

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

       Do not print passwords to standard output. This is useful if you
       want to store a password in kernel keyring with --keyname but do
       not want it to show up on screen or in logs.

   -h, --help
       Print a short help text and exit.


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


   systemd(1), systemctl(1), keyctl(1), plymouth(8), wall(1)


    1. systemd Password Agent Specification

    2. XDG Icon Naming Specification

More Linux Commands

active(5) - List of newsgroups carried by the server........
The file pathdb/active lists the newsgroups carried by INN . This file is generally maintained using ctlinnd(8) to create and remove groups, or by letting contr

MinCmapsOfScreen(3) - screen information functions and macro
The BlackPixelOfScreen macro returns the black pixel value of the specified screen. The WhitePixelOfScreen macro returns the white pixel value of the specified

XcupGetReservedColormapEntries(3) - list colormap entries re
The XcupGetReservedColormapEntries function returns a list of colormap entries (pixels) that are reserved by the system. This list will, at a minimum, contain e

gnutls_strerror(3) - API function - Linux manual page.......
This function is similar to strerror. The difference is that it accepts an error number returned by a gnutls function; In case of an unknown error a descriptive

Net::Server(3pm) - Extensible, general Perl server engine...
Net::Server is an extensible, generic Perl server engine. Net::Server combines the good properties from Net::Daemon (0.34), NetServer::Generic (1.03), and Net::

cidr_table(5) - format of Postfix CIDR tables (Man Page)....
The Postfix mail system uses optional lookup tables. These tables are usually in dbm or db format. Alternatively, lookup tables can be specified in CIDR (Classl

latin6(7) - ISO 8859-10 character set encoded in octal, deci
The ISO 8859 standard includes several 8-bit extensions to the ASCII character set (also known as ISO 646-IRV). ISO 8859-10 encodes the characters used in Nordi

XSelectionEvent(3) - SelectionNotify event structure........
The structure for SelectionNotify events contains: typedef struct { int type; /* SelectionNotify */ unsigned long serial; /* # of last request processed by serv

getparyx(3ncurses) - get curses cursor and window coordinate
The getyx macro places the current cursor position of the given window in the two integer variables y and x. If win is a subwindow, the getparyx macro places th

Tcl_GetVar2(3) - manipulate Tcl variables - Linux man page
These procedures are used to create, modify, read, and delete Tcl variables from C code. Tcl_SetVar2Ex, Tcl_SetVar, Tcl_SetVar2, and Tcl_ObjSetVar2 will create

glIndexs(3gl) - set the current color index - Linux man page
glIndex updates the current (single-valued) color index. It takes one argument, the new value for the current color index. The current index is stored as a floa

libexslt(3) - extension library for XSLT - Linux man page...
The libexslt library is used to provide extensions to XSLT functions. These extensions come from the EXSLT project <> USAGE To make use of

We can't live, work or learn in freedom unless the software we use is free.