f28ad4b251
These files list the set of subordinate uids and gids that users are allowed to use. The expect use case is with the user namespace but other uses are allowed. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
396 lines
11 KiB
Plaintext
396 lines
11 KiB
Plaintext
#
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# /etc/login.defs - Configuration control definitions for the shadow package.
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#
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# $Id$
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#
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#
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# Delay in seconds before being allowed another attempt after a login failure
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# Note: When PAM is used, some modules may enforce a minimum delay (e.g.
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# pam_unix(8) enforces a 2s delay)
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#
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FAIL_DELAY 3
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#
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# Enable logging and display of /var/log/faillog login(1) failure info.
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#
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FAILLOG_ENAB yes
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#
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# Enable display of unknown usernames when login(1) failures are recorded.
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#
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LOG_UNKFAIL_ENAB no
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#
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# Enable logging of successful logins
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#
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LOG_OK_LOGINS no
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#
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# Enable logging and display of /var/log/lastlog login(1) time info.
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#
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LASTLOG_ENAB yes
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#
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# Enable checking and display of mailbox status upon login.
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#
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# Disable if the shell startup files already check for mail
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# ("mailx -e" or equivalent).
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#
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MAIL_CHECK_ENAB yes
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#
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# Enable additional checks upon password changes.
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#
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OBSCURE_CHECKS_ENAB yes
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#
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# Enable checking of time restrictions specified in /etc/porttime.
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#
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PORTTIME_CHECKS_ENAB yes
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#
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# Enable setting of ulimit, umask, and niceness from passwd(5) gecos field.
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#
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QUOTAS_ENAB yes
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#
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# Enable "syslog" logging of su(1) activity - in addition to sulog file logging.
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# SYSLOG_SG_ENAB does the same for newgrp(1) and sg(1).
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#
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SYSLOG_SU_ENAB yes
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SYSLOG_SG_ENAB yes
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#
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# If defined, either full pathname of a file containing device names or
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# a ":" delimited list of device names. Root logins will be allowed only
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# from these devices.
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#
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CONSOLE /etc/securetty
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#CONSOLE console:tty01:tty02:tty03:tty04
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#
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# If defined, all su(1) activity is logged to this file.
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#
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#SULOG_FILE /var/log/sulog
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#
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# If defined, ":" delimited list of "message of the day" files to
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# be displayed upon login.
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#
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MOTD_FILE /etc/motd
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#MOTD_FILE /etc/motd:/usr/lib/news/news-motd
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#
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# If defined, this file will be output before each login(1) prompt.
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#
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#ISSUE_FILE /etc/issue
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#
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# If defined, file which maps tty line to TERM environment parameter.
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# Each line of the file is in a format similar to "vt100 tty01".
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#
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#TTYTYPE_FILE /etc/ttytype
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#
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# If defined, login(1) failures will be logged here in a utmp format.
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# last(1), when invoked as lastb(1), will read /var/log/btmp, so...
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#
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FTMP_FILE /var/log/btmp
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#
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# If defined, name of file whose presence will inhibit non-root
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# logins. The content of this file should be a message indicating
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# why logins are inhibited.
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#
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NOLOGINS_FILE /etc/nologin
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#
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# If defined, the command name to display when running "su -". For
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# example, if this is defined as "su" then ps(1) will display the
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# command as "-su". If not defined, then ps(1) will display the
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# name of the shell actually being run, e.g. something like "-sh".
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#
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SU_NAME su
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#
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# *REQUIRED*
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# Directory where mailboxes reside, _or_ name of file, relative to the
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# home directory. If you _do_ define both, MAIL_DIR takes precedence.
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#
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MAIL_DIR /var/spool/mail
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#MAIL_FILE .mail
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#
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# If defined, file which inhibits all the usual chatter during the login
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# sequence. If a full pathname, then hushed mode will be enabled if the
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# user's name or shell are found in the file. If not a full pathname, then
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# hushed mode will be enabled if the file exists in the user's home directory.
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#
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HUSHLOGIN_FILE .hushlogin
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#HUSHLOGIN_FILE /etc/hushlogins
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#
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# If defined, either a TZ environment parameter spec or the
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# fully-rooted pathname of a file containing such a spec.
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#
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#ENV_TZ TZ=CST6CDT
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#ENV_TZ /etc/tzname
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#
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# If defined, an HZ environment parameter spec.
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#
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# for Linux/x86
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ENV_HZ HZ=100
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# For Linux/Alpha...
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#ENV_HZ HZ=1024
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#
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# *REQUIRED* The default PATH settings, for superuser and normal users.
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#
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# (they are minimal, add the rest in the shell startup files)
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ENV_SUPATH PATH=/sbin:/bin:/usr/sbin:/usr/bin
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ENV_PATH PATH=/bin:/usr/bin
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#
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# Terminal permissions
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#
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# TTYGROUP Login tty will be assigned this group ownership.
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# TTYPERM Login tty will be set to this permission.
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#
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# If you have a write(1) program which is "setgid" to a special group
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# which owns the terminals, define TTYGROUP as the number of such group
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# and TTYPERM as 0620. Otherwise leave TTYGROUP commented out and
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# set TTYPERM to either 622 or 600.
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#
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TTYGROUP tty
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TTYPERM 0600
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#
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# Login configuration initializations:
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#
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# ERASECHAR Terminal ERASE character ('\010' = backspace).
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# KILLCHAR Terminal KILL character ('\025' = CTRL/U).
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# ULIMIT Default "ulimit" value.
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#
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# The ERASECHAR and KILLCHAR are used only on System V machines.
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# The ULIMIT is used only if the system supports it.
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# (now it works with setrlimit too; ulimit is in 512-byte units)
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#
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# Prefix these values with "0" to get octal, "0x" to get hexadecimal.
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#
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ERASECHAR 0177
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KILLCHAR 025
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#ULIMIT 2097152
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# Default initial "umask" value used by login(1) on non-PAM enabled systems.
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# Default "umask" value for pam_umask(8) on PAM enabled systems.
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# UMASK is also used by useradd(8) and newusers(8) to set the mode for new
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# home directories.
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# 022 is the default value, but 027, or even 077, could be considered
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# for increased privacy. There is no One True Answer here: each sysadmin
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# must make up his/her mind.
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UMASK 022
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#
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# Password aging controls:
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#
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# PASS_MAX_DAYS Maximum number of days a password may be used.
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# PASS_MIN_DAYS Minimum number of days allowed between password changes.
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# PASS_MIN_LEN Minimum acceptable password length.
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# PASS_WARN_AGE Number of days warning given before a password expires.
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#
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PASS_MAX_DAYS 99999
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PASS_MIN_DAYS 0
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PASS_MIN_LEN 5
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PASS_WARN_AGE 7
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#
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# If "yes", the user must be listed as a member of the first gid 0 group
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# in /etc/group (called "root" on most Linux systems) to be able to "su"
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# to uid 0 accounts. If the group doesn't exist or is empty, no one
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# will be able to "su" to uid 0.
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#
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SU_WHEEL_ONLY no
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#
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# If compiled with cracklib support, sets the path to the dictionaries
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#
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CRACKLIB_DICTPATH /var/cache/cracklib/cracklib_dict
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#
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# Min/max values for automatic uid selection in useradd(8)
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#
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UID_MIN 1000
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UID_MAX 60000
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# System accounts
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SYS_UID_MIN 101
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SYS_UID_MAX 999
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# Extra per user uids
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SUB_UID_MIN 100000
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SUB_UID_MAX 600100000
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SUB_UID_COUNT 10000
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#
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# Min/max values for automatic gid selection in groupadd(8)
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#
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GID_MIN 1000
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GID_MAX 60000
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# System accounts
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SYS_GID_MIN 101
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SYS_GID_MAX 999
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# Extra per user group ids
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SUB_GID_MIN 100000
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SUB_GID_MAX 600100000
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SUB_GID_COUNT 10000
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#
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# Max number of login(1) retries if password is bad
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#
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LOGIN_RETRIES 5
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#
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# Max time in seconds for login(1)
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#
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LOGIN_TIMEOUT 60
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#
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# Maximum number of attempts to change password if rejected (too easy)
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#
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PASS_CHANGE_TRIES 5
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#
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# Warn about weak passwords (but still allow them) if you are root.
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#
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PASS_ALWAYS_WARN yes
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#
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# Number of significant characters in the password for crypt().
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# Default is 8, don't change unless your crypt() is better.
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# Ignored if MD5_CRYPT_ENAB set to "yes".
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#
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#PASS_MAX_LEN 8
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#
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# Require password before chfn(1)/chsh(1) can make any changes.
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#
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CHFN_AUTH yes
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#
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# Which fields may be changed by regular users using chfn(1) - use
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# any combination of letters "frwh" (full name, room number, work
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# phone, home phone). If not defined, no changes are allowed.
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# For backward compatibility, "yes" = "rwh" and "no" = "frwh".
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#
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CHFN_RESTRICT rwh
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#
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# Password prompt (%s will be replaced by user name).
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#
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# XXX - it doesn't work correctly yet, for now leave it commented out
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# to use the default which is just "Password: ".
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#LOGIN_STRING "%s's Password: "
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#
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# Only works if compiled with MD5_CRYPT defined:
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# If set to "yes", new passwords will be encrypted using the MD5-based
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# algorithm compatible with the one used by recent releases of FreeBSD.
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# It supports passwords of unlimited length and longer salt strings.
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# Set to "no" if you need to copy encrypted passwords to other systems
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# which don't understand the new algorithm. Default is "no".
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#
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# Note: If you use PAM, it is recommended to use a value consistent with
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# the PAM modules configuration.
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#
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# This variable is deprecated. You should use ENCRYPT_METHOD instead.
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#
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#MD5_CRYPT_ENAB no
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#
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# Only works if compiled with ENCRYPTMETHOD_SELECT defined:
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# If set to MD5, MD5-based algorithm will be used for encrypting password
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# If set to SHA256, SHA256-based algorithm will be used for encrypting password
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# If set to SHA512, SHA512-based algorithm will be used for encrypting password
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# If set to DES, DES-based algorithm will be used for encrypting password (default)
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# Overrides the MD5_CRYPT_ENAB option
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#
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# Note: If you use PAM, it is recommended to use a value consistent with
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# the PAM modules configuration.
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#
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#ENCRYPT_METHOD DES
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#
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# Only works if ENCRYPT_METHOD is set to SHA256 or SHA512.
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#
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# Define the number of SHA rounds.
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# With a lot of rounds, it is more difficult to brute-force the password.
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# However, more CPU resources will be needed to authenticate users if
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# this value is increased.
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#
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# If not specified, the libc will choose the default number of rounds (5000).
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# The values must be within the 1000-999999999 range.
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# If only one of the MIN or MAX values is set, then this value will be used.
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# If MIN > MAX, the highest value will be used.
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#
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# SHA_CRYPT_MIN_ROUNDS 5000
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# SHA_CRYPT_MAX_ROUNDS 5000
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#
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# List of groups to add to the user's supplementary group set
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# when logging in from the console (as determined by the CONSOLE
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# setting). Default is none.
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#
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# Use with caution - it is possible for users to gain permanent
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# access to these groups, even when not logged in from the console.
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# How to do it is left as an exercise for the reader...
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#
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#CONSOLE_GROUPS floppy:audio:cdrom
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#
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# Should login be allowed if we can't cd to the home directory?
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# Default is no.
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#
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DEFAULT_HOME yes
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#
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# If this file exists and is readable, login environment will be
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# read from it. Every line should be in the form name=value.
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#
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ENVIRON_FILE /etc/environment
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#
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# If defined, this command is run when removing a user.
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# It should remove any at/cron/print jobs etc. owned by
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# the user to be removed (passed as the first argument).
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#
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#USERDEL_CMD /usr/sbin/userdel_local
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#
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# Enable setting of the umask group bits to be the same as owner bits
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# (examples: 022 -> 002, 077 -> 007) for non-root users, if the uid is
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# the same as gid, and username is the same as the primary group name.
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#
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# This also enables userdel(8) to remove user groups if no members exist.
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#
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USERGROUPS_ENAB yes
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#
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# If set to a non-zero number, the shadow utilities will make sure that
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# groups never have more than this number of users on one line.
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# This permits to support split groups (groups split into multiple lines,
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# with the same group ID, to avoid limitation of the line length in the
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# group file).
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#
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# 0 is the default value and disables this feature.
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#
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#MAX_MEMBERS_PER_GROUP 0
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#
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# If useradd(8) should create home directories for users by default (non
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# system users only).
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# This option is overridden with the -M or -m flags on the useradd(8)
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# command-line.
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#
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#CREATE_HOME yes
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