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1. ×÷ΪrootµÇ¼
2. ¸øÄãÒªÌí¼ÓµÄÓû§ÉèÖÃÓû§Ä¿Â¼£¬ mkdir /home/yang
3. useradd yang -g  users -G 100 -d /home/yang
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4. Ìí¼ÓºÃÓû§ºó£¬ ¸øËûÒ»¸öÃÜÂ룺 passwd yang,  È»ºóÊäÁ½±éÃÜÂë
-->ÃÜÂëÉèÖóɹ¦£¬¿ÉÒÔ¿´ /etc/shadow, ¸ÃÓû§µÄÌõÄ¿ºóµÄÃÜÂë×Ö¶ÎÊÇmd5¼ÓÃܵÄ×Ö·û´®
5. Óû§ºÍÓû§Ä¿Â¼¶¼ÉèºÃÁË£¬µ«ÊÇÓû§Ä¿Â¼µÄȨÏÞ»¹ÊÇrootµÄ£¬¸Äһϣ¬chown yang:users /home/yang
6. ¿ÉÒÔÓÃyangµÇ¼ÁË
7. ¸üиÃÓû§µÄÏà¹ØÉèÖÃÓÃusermod -d xx -g xx
8. »ØÍ·Ïëɾ³ý¸ÃÓû§£º userdel yang
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2. groupadd Ìí¼Ó×é
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1. wrote driver function file(s) .
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