FTP Issue

Hello,

I've rebooted my server and now I am unable to connect to my server via FTP.

I wanted to try to restart the ftp server, however, it seems that I cannot define which ftp server I am using. I always thought this was ProFTP with Plesk?

None of the commands I know worked.

I am running Plesk 12 on a CentOs 7 server.

Who can help me with this?