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Local, distributed database
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not design as secure system
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NIS maps: hosts, passwd, group, ethers, netmasks, protocols, netgroups, services
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ypwhich; ypcat hosts
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yppasswd - disabled
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normal users should not have access to `ypcat':can use `ypcat' to list all usernames, hosts
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one master server, several secondary servers
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medialab (162), brickyard (117), kopernik (117), newton (162), sandman (162), timberland (14), osprey.loc (164), outback (144), clyde (144), acrux (7), pecan (7), mordillo (117)
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NIS+ is completely rewritten (very complex)
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