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/etc/shadow - ʹ Óà Õß ÕÊ ºÅ ×Ê Ñ¶ ¼Ó ÃÜ
/etc/group - Ⱥ ×é ×Ê Ñ¶
/etc/default/useradd - ¶¨ Òå ×Ê Ñ¶
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/etc/skel - ÄÚ º¬ ¶¨ Òå µµ µÄ Ä¿ ¼