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Believe it or not ,I am really new to linux. I do not think I have done anything that is not applicable. I used fdisk and su root because of I have thought it were a VPS. But actually it is not. Thank you for your reply.

maybe I used the command 'sudo root' or fdisk .

I am sorry.I do not mean to hack the server. I am new with Linux.I just used some commands in common use . Otherwise I do not have the root perimission. I will not do anything else out of my directory on the server any more. how to active my account or my account has been suspended forever ?

my heliohost account has been suspended my account is xiaooe,what should I do