Linux about password complexity settings __linux

to set the password complexity under Linux:

(1) Modify/etc/login.defs file

pass_max_days #密码最长过期天数
Pass_min_days #密码最小过期天数
Pass_min_len #密码最小长度
Pass_warn_age 7 #密码过期警告天数

 

(2) Modify/etc/pam.d/system-auth file

find password requisite pam_cracklib.so such a line as the following:

Password requisite pam_cracklib.so retry=5 difok=3 minlen=10 ucredit=-1 lcredit=-3 dcredit=-3 dictpath=/usr/share/c Racklib/pw_dict

parameter meaning:

Number of attempts: 5 least different characters: 3 Minimum password length: 10 least Capital Letter: 1 Least lowercase letters: 3 minimum: 3 Password dictionary:/usr/share/cracklib/pw_dict

 

Note: You may be able to test immediately after modification:

useradd Test

passwd Test

feeling does not work, hehe. This is because you are now running as root. After exiting the root status, try using the test login to change the password.

does it work? It's supposed to work.