Vsftpd configures multiple users, and the last one cannot log in

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I set up a vsftpd in centos6 to set up a virtual user list. The last virtual user is always unable to log in.

that is, to create three accounts, only two can log in, and only the first three can log in when creating four. Have you ever encountered this problem

Centos vsftpd

Mar.10,2021

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