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Text File | 2005-10-13 | 9.6 KB | 359 lines

# # /etc/login.defs - Configuration control definitions for the login package. # # $Id: login.defs.linux,v 1.14 2003/05/04 20:09:43 kloczek Exp $ # # Three items must be defined: MAIL_DIR, ENV_SUPATH, and ENV_PATH. # If unspecified, some arbitrary (and possibly incorrect) value will # be assumed. All other items are optional - if not specified then # the described action or option will be inhibited. # # Comment lines (lines beginning with "#") and blank lines are ignored. # # Modified for Linux. --marekm # # Delay in seconds before being allowed another attempt after a login failure # FAIL_DELAY 3 # # Enable logging and display of /var/log/faillog login failure info. # FAILLOG_ENAB yes # # Enable display of unknown usernames when login failures are recorded. # LOG_UNKFAIL_ENAB no # # Enable logging of successful logins # LOG_OK_LOGINS no # # Enable logging and display of /var/log/lastlog login time info. # LASTLOG_ENAB yes # # Enable checking and display of mailbox status upon login. # # Disable if the shell startup files already check for mail # ("mailx -e" or equivalent). # MAIL_CHECK_ENAB no # # Enable additional checks upon password changes. # OBSCURE_CHECKS_ENAB yes # # Enable checking of time restrictions specified in /etc/porttime. # PORTTIME_CHECKS_ENAB yes # # Enable setting of ulimit, umask, and niceness from passwd gecos field. # QUOTAS_ENAB yes # # 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, this file will be output before each login prompt. # ISSUE_FILE /etc/issue # # 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, login failures will be logged here in a utmp format. # last, when invoked as lastb, will read /var/log/btmp, so... # FTMP_FILE /var/log/btmp # # If defined, name of file whose presence which will inhibit non-root # logins. The contents of this file should be a message indicating # why logins are inhibited. # NOLOGINS_FILE /etc/nologin # # If defined, the command name to display when running "su -". For # example, if this is defined as "su" then a "ps" will display the # command is "-su". If not defined, then "ps" would display the # name of the shell actually being run, e.g. something like "-sh". # SU_NAME su # # *REQUIRED* # Directory where mailboxes reside, _or_ name of file, relative to the # home directory. If you _do_ define both, MAIL_DIR takes precedence. # QMAIL_DIR is for Qmail # #QMAIL_DIR Maildir MAIL_DIR /var/spool/mail #MAIL_FILE .mail # # 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 # # If defined, the presence of this value in an /etc/passwd "shell" field will # disable logins for that user, although "su" will still be allowed. # # XXX this does not seem to be implemented yet... --marekm # no, it was implemented but I ripped it out ;-) -- jfh NOLOGIN_STR NOLOGIN # # If defined, either a TZ environment parameter spec or the # fully-rooted pathname of a file containing such a spec. # #ENV_TZ TZ=CST6CDT #ENV_TZ /etc/tzname # # If defined, an HZ environment parameter spec. # # for Linux/x86 ENV_HZ HZ=100 # For Linux/Alpha... #ENV_HZ HZ=1024 # # *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=/bin:/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 0600 # # Login configuration initializations: # # ERASECHAR Terminal ERASE character ('\010' = backspace). # KILLCHAR Terminal KILL character ('\025' = CTRL/U). # UMASK Default "umask" value. # ULIMIT Default "ulimit" value. # # The ERASECHAR and KILLCHAR are used only on System V machines. # The ULIMIT is used only if the system supports it. # (now it works with setrlimit too; ulimit is in 512-byte units) # # Prefix these values with "0" to get octal, "0x" to get hexadecimal. # ERASECHAR 0177 KILLCHAR 025 UMASK 022 #ULIMIT 2097152 # # 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_MIN_LEN Minimum acceptable password length. # PASS_WARN_AGE Number of days warning given before a password expires. # PASS_MAX_DAYS 99999 PASS_MIN_DAYS 0 PASS_MIN_LEN 5 PASS_WARN_AGE 7 # # If "yes", the user must be listed as a member of the first gid 0 group # in /etc/group (called "root" on most Linux systems) to be able to "su" # to uid 0 accounts. If the group doesn't exist or is empty, no one # will be able to "su" to uid 0. # SU_WHEEL_ONLY yes # # If compiled with cracklib support, where are the dictionaries # CRACKLIB_DICTPATH /usr/lib/cracklib_dict # # Min/max values for automatic uid selection in useradd # UID_MIN 1000 UID_MAX 60000 # # Min/max values for automatic gid selection in groupadd # GID_MIN 100 GID_MAX 60000 # # Max number of login retries if password is bad # LOGIN_RETRIES 3 # # Max time in seconds for login # LOGIN_TIMEOUT 60 # # Maximum number of attempts to change password if rejected (too easy) # PASS_CHANGE_TRIES 5 # # Warn about weak passwords (but still allow them) if you are root. # PASS_ALWAYS_WARN yes # # Number of significant characters in the password for crypt(). # Default is 8, don't change unless your crypt() is better. # Ignored if MD5_CRYPT_ENAB set to "yes". # #PASS_MAX_LEN 8 # # Require password before chfn/chsh can make any changes. # CHFN_AUTH yes # # 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 # # Password prompt (%s will be replaced by user name). # # XXX - it doesn't work correctly yet, for now leave it commented out # to use the default which is just "Password: ". #LOGIN_STRING "%s's Password: " # # Only works if compiled with MD5_CRYPT defined: # If set to "yes", new passwords will be encrypted using the MD5-based # algorithm compatible with the one used by recent releases of FreeBSD. # It supports passwords of unlimited length and longer salt strings. # Set to "no" if you need to copy encrypted passwords to other systems # which don't understand the new algorithm. Default is "no". # MD5_CRYPT_ENAB yes # # 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 this file exists and is readable, login environment will be # read from it. Every line should be in the form name=value. # ENVIRON_FILE /etc/environment # # 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). # #USERDEL_CMD /usr/sbin/userdel_local # # When prompting for password without echo, getpass() can optionally # display a random number (in the range 1 to GETPASS_ASTERISKS) of '*' # characters for each character typed. This feature is designed to # confuse people looking over your shoulder when you enter a password :-). # Also, the new getpass() accepts both Backspace (8) and Delete (127) # keys to delete previous character (to cope with different terminal # types), Control-U to delete all characters, and beeps when there are # no more characters to delete, or too many characters entered. # # Setting GETPASS_ASTERISKS to 1 results in more traditional behaviour - # exactly one '*' displayed for each character typed. # # Setting GETPASS_ASTERISKS to 0 disables the '*' characters (Backspace, # Delete, Control-U and beep continue to work as described above). # # Setting GETPASS_ASTERISKS to -1 reverts to the traditional getpass() # without any new features. This is the default. # GETPASS_ASTERISKS 0 # # 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 yes