设置linux的密码强度
sudo vim /etc/pam.d/system-auth
auth required pam_faillock.so preauth audit deny=3 even_deny_root unlock_time=300
password requisite pam_pwquality.so try_first_pass local_users_only retry=3 authtok_type= minlen=12 lcredit=-1 ucredit=-1 dcredit=-1 ocredit=-1 enforce_for_root
配置sshd登录失，锁住
sudo vim /etc/pam.d/sshd
auth required pam_faillock.so preauth silent audit even_deny_root deny=3 unlock_time=300
设置存活时间
sudo vim /etc/profile
export TMOUT=600
sudo vim /etc/login.defs
2、 配置： PASS_MAX_DAYS 90 PASS_MIN_DAYS 2 PASS_MIN_LEN 8
SecretKey012345678901234567890123456789012345678901234567890123456789
