“2003” error reported by sqlyog for Linux remote connection solution

Just now xsell tried to connect to the database, but it couldn’t do anything. The error is reported: 2003, as shown in the following figure:


In xshell   ①   After closing the Linux Firewall   ② Start MySQL service   ③   After logging in with root, you need to authorize root, as shown in the figure below.


  Then it succeeded!


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