由于Linux非常的受欢迎，最近很多朋友都在学习Linux，本文为你讲解Linux用户口令，希望你能学好Linux用户口令。以前别人问做USER口令控制时，推荐别人使用/etc/shadow,后来想想，好好别的地方也行，这一翻，发现以下也可以控制。
- [root@linux1 init.d]# more /etc/login.defs
- # *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
- # 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
- #
- # Min/max values for automatic uid selection in useradd
- #
- UID_MIN 500
- UID_MAX 60000
- #
- # Min/max values for automatic gid selection in groupadd
- #
- GID_MIN 500
- GID_MAX 60000
- #
- # 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
- #
- # If useradd should create home directories for users by default
- # On RH systems, we do. This option is overridden with the -M flag on
- # useradd command line.
- #
- CREATE_HOME yes
- [root@linux1 init.d]#
这样你就能学会Linux用户口令控制。
