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    sysfs ÊÇ Linux ÄÚºËÖÐÉè¼Æ½ÏеÄÒ»ÖÖÐéÄâµÄ»ùÓÚÄÚ´æµÄÎļþϵͳ£¬ËüµÄ×÷ÓÃÓë proc ÓÐЩÀàËÆ£¬µ«³ýÁËÓë proc ÏàͬµÄ¾ßÓв鿴ºÍÉ趨Äں˲ÎÊý¹¦ÄÜÖ®Í⣬»¹ÓÐΪ Linux ͳһÉ豸ģÐÍ×÷Ϊ¹ÜÀíÖ®Óá£Ïà±ÈÓÚ proc Îļþϵͳ£¬Ê¹Óà sysfs µ¼³öÄÚºËÊý¾ÝµÄ·½Ê½¸üΪͳһ£¬²¢ÇÒ×éÖ¯µÄ·½Ê½¸üºÃ£¬ËüµÄÉè¼Æ´Ó proc ÖÐÎüÈ¡Á˺ܶà½Ìѵ¡£±¾ÎÄ¾Í sysfs µÄ¹ÒÔØµã /sys Ŀ¼½á¹¹¡¢ÆäÓë Linux ͳһÉ豸ģÐ͵ĹØÏµ¡¢³£¼ûÊôÐÔÎļþµÄÓ÷¨µÈ·½Ãæ¶Ô sysfs ×÷ÈëÃŽéÉÜ£¬²¢ÇÒ¾ÍÄں˱à³Ì·½Ã棬ÒÔ¾ßÌåµÄÀý×ÓÀ´Õ¹Ê¾ÈçºÎÌí¼Ó sysfs Ö§³Ö¡£
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LinuxÂ̰Ó

DansGuardian
, written by SmoothWall Ltd and others, is content-control software: software designed to control which websites users can access. It also includes virus filtering and usage monitoring features. DansGuardian must be installed on a Unix or Linux computer, such as a server computer; its filtering extends to all computers in an organization, including Windows and Macintosh computers. DansGuardian is used by schools, businesses, value-added Internet service providers, and others.
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