centos7设置密码规则,centos7设置密码用户必须在天内更改密


出于安全考虑设置密码规则

设置密码到期的天数。


用户必须在天内更改密码。


此设置仅影响创建用户,而不会影响现有用户。


如果设置为现有用户,请运行命令“chage -M(days)(user)”。PASS_MAX_DAYS 60 # 密码到期时间PASS_MIN_DAYS 3 # 初始密码更改时间PASS_MIN_LEN 8 # 密码最小长度PASS_WARN_AGE 7 # 密码过期提示时间重复密码限制使用[root@linuxprobe~]# vi /etc/pam.d/system-auth# near line 15: prohibit to use the same password for 5 generation in pastpassword sufficient pam_unix.so sha512 shadow nullok try_first_pass use_authtok remember=5设置最小密码长度。 用户不能设置小于此参数的密码长度。# set 8 for minimum password length[root@linuxprobe~]# authconfig --passminlen=8 --update# the parameter is set in a config below[root@linuxprobe~]# grep "^minlen" /etc/security/pwquality.confminlen = 8# 在新密码中设置同一类的允许连续字符的最大数目# set 4 for maximum number of allowed consecutive characters of the same class[root@linuxprobe~]# authconfig --passmaxclassrepeat=4 --update# the parameter is set in a config below[root@linuxprobe~]# grep "^maxclassrepeat" /etc/security/pwquality.confmaxclassrepeat = 4# 在新密码中至少需要一个小写字符。[root@linuxprobe~]# authconfig --enablereqlower --update# the parameter is set in a config below# (if you'd like to edit the value, edit it with vi and others)[root@linuxprobe~]# grep "^lcredit" /etc/security/pwquality.conflcredit = -1# 在新密码中至少需要一个大写字符[root@linuxprobe~]# authconfig --enablerequpper --update# the parameter is set in a config below# (if you'd like to edit the value, edit it with vi and others)[root@linuxprobe~]# grep "^ucredit" /etc/security/pwquality.confucredit = -1# 在新密码中至少需要一个数字[root@linuxprobe~]# authconfig --enablereqdigit --update# the parameter is set in a config below# (if you'd like to edit the value, edit it with vi and others)[root@linuxprobe~]# grep "^dcredit" /etc/security/pwquality.confdcredit = -1# 密码包括至少一个特殊字符[root@linuxprobe~]# authconfig --enablereqother --update# the parameter is set in a config below# (if you'd like to edit the value, edit it with vi and others)[root@linuxprobe~]# grep "^ocredit" /etc/security/pwquality.confocredit = -1# 在新密码中设置单调字符序列的最大长度。 (ex⇒'12345','fedcb')[root@linuxprobe~]# vi /etc/security/pwquality.conf# add to the endmaxsequence = 3# 设置新密码中不能出现在旧密码中的字符数[root@linuxprobe~]# vi /etc/security/pwquality.conf# add to the enddifok = 5# 检查来自用户passwd条目的GECOS字段的长度超过3个字符的字是否包含在新密码中。[root@linuxprobe~]# vi /etc/security/pwquality.conf# add to the endgecoscheck = 1# 设置不能包含在密码中的Ssace分隔的单词列表[root@linuxprobe~]# vi /etc/security/pwquality.conf# add to the endbadwords = denywords1 denywords2 denywords3# 为新密码设置hash / crypt算法。 (默认为sha512)# show current algorithm[root@linuxprobe~]# authconfig --test | grep hashingpassword hashing algorithm is md5# chnage algorithm to sha512[root@linuxprobe~]# authconfig --passalgo=sha512 --update[root@linuxprobe~]# authconfig --test | grep hashingpassword hashing algorithm is sha512

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