What are the addresses of general Internet projects, production environments and test environments?

what are the addresses of general Internet projects, production environments and test environments?


1. Address? Does it refer to the form of url? Just be happy.
2. If you have hosts, you can resolve whatever domain name you like locally, and the test can be exactly the same as the production url.
3. It is certain that the internal routing specification is named. But the internal url used for production and testing must be the same.
4. It's just a different name.

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MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e3c60d-64cc6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e3c60d-64cc6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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