All Docker container runs will specify a running command, which is the startup command of the main process in the container, and the exit code in the container exit status is actually the exit code of this process. In other words, you can directly equate the exit code in Docker with the Linux execution return code.

Yes, it is the status code of Linux.

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Appendix:

http://blog.chinaunix.net/uid...

The above link is a list of status codes.

This is the conventional status code, you can see it in /usr/include/errno.h.

actually

/usr/include/errno.h -> 指向下一个文件 /usr/include/bits/errno.h ->指向下一个文件 /usr/include/linux/errno.h ->指向下一个文件 /usr/include/asm/errno.h ->指向下一个文件 /usr/include/asm-generic/errno.h -> 35及以后的状态码在这里，同时指向下一个文件 /usr/include/asm-generic/errno-base.h -> 34及以前的状态码在这里

The status code of docker is not very useful. It means that it runs successfully or if there is a problem after running it, the container is terminated. If docker ps does not come out, it means the operation failed. Sometimes there is a configuration problem when mounting the file, but docker ps -a will come out. It's better to delete it, because next time you use the same container name, there will be a conflict and it will not be started.