Disable SSH to ONE user

Hi there,

i have a box with plain Redhat 9.0, users of this box can have SSH access but i want to disable SSH access to ONE specific user. How can i do that?

And to the users with SSH and FTP access how can i "block" them in ther /home/user directory?

I'm using vsftpd and when a user ftp to the server he can browse all the server.

Thanks for your help!

 

 

 

 

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