Some of the problems UNIX system accounts, online and other answers!
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Users questions: UNIX account on behalf of all the back "!""*" What is the meaning of? There are UNIX account UID is not the only ah? I found that the system there are two UID 0 account ... ... is going on here eager to master how to answer ~!, * Refers to the PASSWD file (user list)
Experts answer: * Display the contents of the password that the user has stored the original user's password here md5 value, then you can break, and put the password into another file to the (shadow, shadow files), only passwd, leaving a *. ! Is not clear, at least in linu x of this file is not! UID, not that useridentif ... Well, within the system to use it to identify the user. Under normal circumstances it is the one to one correspondence with the user name. If several user name corresponds to the user identification number is the same, within the system will treat them as the same user, but They can have different passwords, different and different log home directory Shell and so on.
Experts answer: * Display the contents of the password that the user has stored the original user's password here md5 value, then you can break, and put the password into another file to the (shadow, shadow files), only passwd, leaving a *. ! Is not clear, at least in linu x of this file is not! UID, not that useridentif ... Well, within the system to use it to identify the user. Under normal circumstances it is the one to one correspondence with the user name. If several user name corresponds to the user identification number is the same, within the system will treat them as the same user, but They can have different passwords, different and different log home directory Shell and so on.
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