problem:
This is usually not noticed this problem, when I use the ln -s xxx yyy xxx to yyy moving path, the folder becomes a txt file,
solve:
Looking for a long, found the answer on stackoverflow, very simple, I used the `folder in the source file.`, Ln relative path is not allowed. So change the absolute path
Sentence plus $ PWD / can be.
Interestingly, in the target folder ./ use relative paths are possible. That second argument can be a relative path, which explains I usually do not encounter
This problem, because I used to like to execute commands on the target file directory
reference:
stackoverflow：