linux 中启动用户和组时出现错误信息解决方法

　　When I try to start system-config-users I get the following msg:

　　"The user database cannot be read. This problem is most likely caused by a mismatch between /etc/passwd and /etc/shadow or /etc/group and /etc/gshadow. The program will exit now."

　　or

　　当设置时会出现一把钥匙,点击会报：

　　"You''re currently authorized to configure system-wide setting (that affect all users) withou typing the administrator password again. You can give up this authorization"

　　they discuss world issues and look for solutions:

　　I had deleted a user from my password file using vi. apprently the group was still exesting so it was giving errors loading. to fix this

　　i went to command line and

　　groupdel test <-- test is the user i deleted from /etc/passwd using vi

　　useradd test

　　works fine now

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