#1. pwquality 점검 mv /etc/security/pwquality.conf /etc/security/pwquality_old.conf echo -e "minlen = 8\ndcredit = -1\nucredit = -1\nlcredit = -1\nocredit = -1\n" | cat - /etc/security/pwquality_old.conf > /etc/security/pwquality.conf rm /etc/security/pwquality_old.conf #2. faillock 설정 (10번 이상 로그인 실패시 10분간 차단)authselect select sssd --force authselect enable-feature with-faillock sed -i "/# deny = ..