# # /etc/login.defs - Configuration control definitions for the shadow package. # # # Delay in seconds before being allowed another attempt after a login failure # Note: When PAM is used, some modules may enfore a minimal delay (e.g. # pam_unix enforces a 2s delay) # FAIL_DELAY 3 # # Enable display of unknown usernames when login failures are recorded. # LOG_UNKFAIL_ENAB no # # Enable logging of successful logins # LOG_OK_LOGINS no # # Enable "syslog" logging of su activity - in addition to sulog file logging. # SYSLOG_SG_ENAB does the same for newgrp and sg. # SYSLOG_SU_ENAB yes SYSLOG_SG_ENAB yes # # If defined, either full pathname of a file containing device names or # a ":" delimited list of device names. Root logins will be allowed only # upon these devices. # CONSOLE /etc/securetty #CONSOLE console:tty01:tty02:tty03:tty04 # # If defined, all su activity is logged to this file. # #SULOG_FILE /var/log/sulog # # If defined, ":" delimited list of "message of the day" files to # be displayed upon login. # MOTD_FILE /etc/motd #MOTD_FILE /etc/motd:/usr/lib/news/news-motd # # If defined, file which maps tty line to TERM environment parameter. # Each line of the file is in a format something like "vt100 tty01". # #TTYTYPE_FILE /etc/ttytype # # If defined, file which inhibits all the usual chatter during the login # sequence. If a full pathname, then hushed mode will be enabled if the # user's name or shell are found in the file. If not a full pathname, then # hushed mode will be enabled if the file exists in the user's home directory. # #HUSHLOGIN_FILE .hushlogin HUSHLOGIN_FILE /etc/hushlogins # # *REQUIRED* The default PATH settings, for superuser and normal users. # # (they are minimal, add the rest in the shell startup files) ENV_SUPATH PATH=/sbin:/bin:/usr/sbin:/usr/bin ENV_PATH PATH=/usr/local/bin:/usr/bin:/bin # # The default PATH settings for root (used by login): # ENV_ROOTPATH /sbin:/bin:/usr/sbin:/usr/bin # # Terminal permissions # # TTYGROUP Login tty will be assigned this group ownership. # TTYPERM Login tty will be set to this permission. # # If you have a "write" program which is "setgid" to a special group # which owns the terminals, define TTYGROUP to the group number and # TTYPERM to 0620. Otherwise leave TTYGROUP commented out and assign # TTYPERM to either 622 or 600. # TTYGROUP tty TTYPERM 0620 # # Login configuration initializations: # # ERASECHAR Terminal ERASE character ('\010' = backspace). # KILLCHAR Terminal KILL character ('\025' = CTRL/U). # # The ERASECHAR and KILLCHAR are used only on System V machines. # # Prefix these values with "0" to get octal, "0x" to get hexadecimal. # ERASECHAR 0177 KILLCHAR 025 # Default initial "umask" value used by login on non-PAM enabled systems. # Default "umask" value for pam_umask on PAM enabled systems. # UMASK is also used by useradd and newusers to set the mode of new home # directories. # 022 is the default value, but 027, or even 077, could be considered # better for privacy. There is no One True Answer here: each sysadmin # must make up her mind. UMASK 022 # # Password aging controls: # # PASS_MAX_DAYS Maximum number of days a password may be used. # PASS_MIN_DAYS Minimum number of days allowed between password changes. # PASS_WARN_AGE Number of days warning given before a password expires. # PASS_MAX_DAYS 99999 PASS_MIN_DAYS 0 PASS_WARN_AGE 7 # # Min/max values for automatic uid selection in useradd # # SYS_UID_MIN to SYS_UID_MAX inclusive is the range for # UIDs for dynamically allocated administrative and system accounts. # UID_MIN to UID_MAX inclusive is the range of UIDs of dynamically # allocated user accounts. # UID_MIN 2000 UID_MAX 60000 # System accounts SYS_UID_MIN 100 SYS_UID_MAX 499 # # Min/max values for automatic gid selection in groupadd # # SYS_GID_MIN to SYS_GID_MAX inclusive is the range for # GIDs for dynamically allocated administrative and system groups. # GID_MIN to GID_MAX inclusive is the range of GIDs of dynamically # allocated groups. # GID_MIN 1000 GID_MAX 60000 # System accounts SYS_GID_MIN 100 SYS_GID_MAX 499 # # Max number of login retries if password is bad # LOGIN_RETRIES 3 # # Max time in seconds for login # LOGIN_TIMEOUT 60 # # Which fields may be changed by regular users using chfn - use # any combination of letters "frwh" (full name, room number, work # phone, home phone). If not defined, no changes are allowed. # For backward compatibility, "yes" = "rwh" and "no" = "frwh". # CHFN_RESTRICT rwh # # If set to MD5 , MD5-based algorithm will be used for encrypting password # If set to SHA256, SHA256-based algorithm will be used for encrypting password # If set to SHA512, SHA512-based algorithm will be used for encrypting password # If set to DES, DES-based algorithm will be used for encrypting password (default) # Overrides the MD5_CRYPT_ENAB option # # Note: If you use PAM, it is recommended to use a value consistent with # the PAM modules configuration. # ENCRYPT_METHOD SHA512 # # Only works if ENCRYPT_METHOD is set to SHA256 or SHA512. # # Define the number of SHA rounds. # With a lot of rounds, it is more difficult to brute forcing the password. # But note also that it more CPU resources will be needed to authenticate # users. # # If not specified, the libc will choose the default number of rounds (5000). # The values must be inside the 1000-999999999 range. # If only one of the MIN or MAX values is set, then this value will be used. # If MIN > MAX, the highest value will be used. # # SHA_CRYPT_MIN_ROUNDS 5000 # SHA_CRYPT_MAX_ROUNDS 5000 # # List of groups to add to the user's supplementary group set # when logging in on the console (as determined by the CONSOLE # setting). Default is none. # # Use with caution - it is possible for users to gain permanent # access to these groups, even when not logged in on the console. # How to do it is left as an exercise for the reader... # #CONSOLE_GROUPS floppy:audio:cdrom # # Should login be allowed if we can't cd to the home directory? # Default in no. # DEFAULT_HOME yes # # If defined, this command is run when removing a user. # It should remove any at/cron/print jobs etc. owned by # the user to be removed (passed as the first argument). # # See USERDEL_PRECMD/POSTCMD below. # #USERDEL_CMD /usr/sbin/userdel_local # # Enable setting of the umask group bits to be the same as owner bits # (examples: 022 -> 002, 077 -> 007) for non-root users, if the uid is # the same as gid, and username is the same as the primary group name. # # This also enables userdel to remove user groups if no members exist. # USERGROUPS_ENAB no # # If set to a non-nul number, the shadow utilities will make sure that # groups never have more than this number of users on one line. # This permit to support split groups (groups split into multiple lines, # with the same group ID, to avoid limitation of the line length in the # group file). # # 0 is the default value and disables this feature. # #MAX_MEMBERS_PER_GROUP 0 # # If useradd should create home directories for users by default (non # system users only) # This option is overridden with the -M or -m flags on the useradd command # line. # CREATE_HOME no # # User/group names must match the following regex expression. # The default is [A-Za-z_][A-Za-z0-9_.-]*[A-Za-z0-9_.$-]\?, # but be aware that the result could depend on the locale settings. # #CHARACTER_CLASS [A-Za-z_][A-Za-z0-9_.-]*[A-Za-z0-9_.$-]\? CHARACTER_CLASS [ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_][ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.-]*[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.$-]\? # # If defined, this command is run when adding a group. # It should rebuild any NIS database etc. to add the # new created group. # GROUPADD_CMD /usr/sbin/groupadd.local # # If defined, this command is run when adding a user. # It should rebuild any NIS database etc. to add the # new created account. # USERADD_CMD /usr/sbin/useradd.local # # If defined, this command is run before removing a user. # It should remove any at/cron/print jobs etc. owned by # the user to be removed. # USERDEL_PRECMD /usr/sbin/userdel-pre.local # # If defined, this command is run after removing a user. # It should rebuild any NIS database etc. to remove the # account from it. # USERDEL_POSTCMD /usr/sbin/userdel-post.local