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²é¿´Îļþ cat ,less , more£º cat ÏÔʾËùÓÐ less ·ÖÆÁÏÔʾ£¨¿ÉÒÔʹÓÃÉÏϼýÍ·,killÃüÁî½áÊø£© more (¿Õ¸ñ·­Ò³,ÎÞ·¨¿´ÉÏÒ»Ò³)

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Áбí ls£º ls -l ÁбíÐÎʽÏÔʾÎļþ ls -a ÏÔʾËùÓÐÎļþ

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жÔØ£º umount /dev/cdrom ,eject /dev/cdrom µ¯³ö¹âÇý

Ó²ÅÌËٶȣº hdparm sudo hdparm -tT /dev/sda ²âÊÔÓ²Å̶ÁÈ¡ËÙ¶È

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sudo groupmod -n user2 user1£¨ÐÞ¸ÄÓû§×éuser1 Ãû³ÆΪuser2£©

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