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how to block a user

Way 1 : Move the user into /sbin/nologin shell       syntax :  usermod username -s /sbin/nologin                   [root@localhost ~] ...

  • how to block a user
    Way 1 : Move the user into /sbin/nologin shell       syntax :  usermod username -s /sbin/nologin                   [root@localhost ~] ...
  • how to enable ssh root login
       Edit the configuration file of vi /etc/ssh/sshd_config   Change the config file from PermitRootLogin no to PermitRootLogin yes    ...