The format of Oracle tnsnames. ora file

The format of Oracle tnsnames. ora file tnsnames of Oracle. the ora file has strict format requirements: tnsname. the ora content is an example to illustrate the hidden password weapon: the rule is as follows: The red font section, because it is the first line, there must be no space in front of this line, it is the second line. There can be spaces or no spaces in front of it. They can all be in a blue font. There must be spaces in front of it. Summary: The first line cannot contain spaces. Other lines must contain spaces !!!!