密码的暴力破解是黑客惯用的入侵手段。为了防止密码猜测、密码破解,可以采取设置帐户锁定登录失败锁定次数、锁定时间。为此,应修改下列哪个文件?()
(A)/etc/pam.d/authconfig
(B)/etc/pam.d/password-auth-ac
(C)/etc/pam.d/system-auth
(D)/etc/pam.d/passwd
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(A)/etc/pam.d/authconfig
(B)/etc/pam.d/password-auth-ac
(C)/etc/pam.d/system-auth
(D)/etc/pam.d/passwd