pam_time 8 Linux-PAM Manual pam_time PAM module for time control access pam_time.so The pam_time PAM module does not authenticate the user, but instead it restricts access to a system and or specific applications at various times of the day and on specific days or over various terminal lines. This module can be configured to deny access to (individual) users based on their name, the time of day, the day of week, the service they are applying for and their terminal from which they are making their request. By default rules for time/port access are taken from config file /etc/security/time.conf. This module does not recognise any options. Only the account service is supported. PAM_SUCCESS Access was granted. PAM_ABORT Not all relevant data could be gotten. PAM_BUF_ERR Memory buffer error. PAM_PERM_DENIED Access was not granted. PAM_USER_UNKNOWN The user is not known to the system. /etc/security/time.conf Default configuration file #%PAM-1.0 # # apply pam_time accounting to login requests # login account required pam_time.so time.conf5 , pam.d8 , pam8 . pam_time was written by Andrew G. Morgan <morgan@kernel.org>.