Open Oracle server under Linux to allow remote connection

Environmental Science ：linux,oracle The server , Use docker Inside python visit oracle database .

Report errors ：ORA-12541:TNS:no listener 

screening ：

su - oracle Switch to oracle After user , use sqlplus You can connect to the database , It shows that the database itself is OK .

function ：lsnrctl status, It is found that the listening terminal is localhost.

got it , This limits the remote connection .

resolvent ：

modify Configure server listener.ora, add HOST=0.0.0.0, If not , By default, only programs running on this computer can access .

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST =0.0.0.0)(PORT = 1521))
)
 

Restart monitoring ：lsnrctl stop、lsnrctl start