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½¨ÉèÓû§£ºÊ¹ÓÃuseraddÏÂÁî¿ÉÒÔ½¨ÉèÐÂÓû§ £¬ÀýÈ磺sudo useradd username

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ɾ³ýÓû§£ºÊ¹ÓÃuserdelÏÂÁî¿ÉÒÔɾ³ýÓû§ £¬ÀýÈ磺sudo userdel -r username

½¨ÉèÓû§×飺ʹÓÃgroupaddÏÂÁî¿ÉÒÔ½¨ÉèÓû§×é £¬ÀýÈ磺sudo groupadd groupname

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sudo chmod 755 filename    // ËùÓÐÕß¾ßÓжÁ¡¢Ð´¡¢Ö´ÐÐȨÏÞ£¬Í¬×éÓû§ºÍÆäËûÓû§Ö»¾ßÓжÁºÍÖ´ÐÐȨÏÞ
sudo chmod +x filename     // ¸øÎļþÌí¼ÓÖ´ÐÐȨÏÞ
sudo chmod u-r filename    // È¥³ýËùÓÐÕߵĶÁȨÏÞ

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Sudo£¨superuser do£©ÊÇLinuxϵͳÖÐÒ»¸öÖ÷ÒªµÄÏÂÁî £¬ËüÔÊÐíͨË×Óû§ÒÔ³¬µÈÓû§µÄÉí·ÝÖ´ÐÐÌض¨µÄÏÂÁͨ¹ýSudoȨÏÞ £¬¿ÉÒÔÏÞÖÆÓû§µÄ²Ù×÷¹æÄ£ºÍȨÏÞ¡£

ÉèÖÃSudoȨÏÞ£ºÊ¹ÓÃvisudoÏÂÁî¿ÉÒԱ༭sudoÉèÖÃÎļþ/etc/sudoers £¬ÒÔÊÚȨ»ò×÷·ÏͨË×Óû§Ö´ÐÐÌض¨ÃüÁîµÄȨÏÞ¡£ÀýÈ磺

username ALL=(ALL) ALL    // ÊÚȨÓû§Ö´ÐÐËùÓÐÏÂÁî
username ALL=(root) /bin/ls    // ÊÚȨÓû§Ö»ÄÜÖ´ÐÐ/bin/lsÏÂÁî

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sudo ufw enable    // ¿ªÆô·À»ðǽ
sudo ufw allow ssh    // ÔÊÐíSSHÅþÁ¬

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sudo ufw status    // Éó²é·À»ðǽ״̬
sudo ufw allow 80    // ÔÊÐíHTTP»á¼û
sudo ufw delete allow 80    // ɾ³ýHTTP»á¼û¹æÔò

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sudo useradd username
sudo passwd username

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sudo chmod 755 filename
sudo chmod +x filename
sudo chmod u-r filename

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sudo visudo

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username ALL=(ALL) ALL
username ALL=(root) /bin/ls

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sudo ufw enable
sudo ufw allow ssh

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