Linux cannot connect through FTP mode, but can connect through SFTP mode

Quoted from: http://jingyan.baidu.com/article/676629974e67cb54d51b84ea.html

What should I do if I fail to connect to the linux server using the ftp client? Generally, the following two situations are often encountered when it is not connected:)

Case 1: The server does not open the ftp service

1. 1

    Phenomenon: An unknown error is displayed when using the ftp client to log in

    

   
2. 2

    Reason: ftp service is not enabled, you can use the command chkconfig to view

    

   
3. 3

    Solution: Use the command service to start the ftp service

    

   
   END

Case 2: Insufficient permissions

1.  

    Phenomenon: No permission to enter the specified directory

    

   
2.  

    Reason: permission setting problem, use the command getsebool to view (need to execute with root permission)

   You can see that the switch is off

   
3.  

    Solution: Turn on the permission setting switch and use the command setsebool (need to execute with root permission)

    

    

   

4.