faillog(8) — Linux manual page


FAILLOG(8)               System Management Commands               FAILLOG(8)

NAME         top

       faillog - display faillog records or set login failure limits

SYNOPSIS         top

       faillog [options]

DESCRIPTION         top

       faillog displays the contents of the failure log database
       (/var/log/faillog). It can also set the failure counters and limits.
       When faillog is run without arguments, it only displays the faillog
       records of the users who had a login failure.

OPTIONS         top

       The options which apply to the faillog command are:

       -a, --all
           Display (or act on) faillog records for all users having an entry
           in the faillog database.

           The range of users can be restricted with the -u option.

           In display mode, this is still restricted to existing users but
           forces the display of the faillog entries even if they are empty.

           With the -l, -m, -r, -t options, the users' records are changed,
           even if the user does not exist on the system. This is useful to
           reset records of users that have been deleted or to set a policy
           in advance for a range of users.

       -h, --help
           Display help message and exit.

       -l, --lock-secs SEC
           Lock account for SEC seconds after failed login.

           Write access to /var/log/faillog is required for this option.

       -m, --maximum MAX
           Set the maximum number of login failures after the account is
           disabled to MAX.

           Selecting a MAX value of 0 has the effect of not placing a limit
           on the number of failed logins.

           The maximum failure count should always be 0 for root to prevent
           a denial of services attack against the system.

           Write access to /var/log/faillog is required for this option.

       -r, --reset
           Reset the counters of login failures.

           Write access to /var/log/faillog is required for this option.

       -R, --root CHROOT_DIR
           Apply changes in the CHROOT_DIR directory and use the
           configuration files from the CHROOT_DIR directory.

       -t, --time DAYS
           Display faillog records more recent than DAYS.

       -u, --user LOGIN|RANGE
           Display faillog record or maintains failure counters and limits
           (if used with -l, -m or -r options) only for the specified

           The users can be specified by a login name, a numerical user ID,
           or a RANGE of users. This RANGE of users can be specified with a
           min and max values (UID_MIN-UID_MAX), a max value (-UID_MAX), or
           a min value (UID_MIN-).

       When none of the -l, -m, or -r options are used, faillog displays the
       faillog record of the specified user(s).

CAVEATS         top

       faillog only prints out users with no successful login since the last
       failure. To print out a user who has had a successful login since
       their last failure, you must explicitly request the user with the -u
       flag, or print out all users with the -a flag.

FILES         top

           Failure logging file.

SEE ALSO         top

       login(1), faillog(5).

COLOPHON         top

       This page is part of the shadow-utils (utilities for managing
       accounts and shadow password files) project.  Information about the
       project can be found at ⟨⟩.  If
       you have a bug report for this manual page, send it to  This page was obtained
       from the project's upstream Git repository
       ⟨⟩ on 2020-09-18.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2020-08-28.)  If you discover any rendering problems in
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       of the original manual page), send a mail to

shadow-utils 4.8.1               09/18/2020                       FAILLOG(8)

Pages that refer to this page: faillog(5)pam_tally(8)