FAILLOG - Online Linux Manual PageSection : 8
Updated : 02/07/2020
Source : shadow−utils 4​.8​.1
Note : System Management Commands

NAMEfaillog − display faillog records or set login failure limits

SYNOPSISfaillog [options]

DESCRIPTIONfaillog 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​.

OPTIONSThe 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 user(s)​. 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)​.

CAVEATSfaillog 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/var/log/faillog Failure logging file​.

SEE ALSOlogin(1), faillog(5)​.
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