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). 0
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