MySQL backup and recovery problems

I would like to remind you that sometimes the commands on the Internet are too boring to copy them.

Here we will list MySQL backup: gzip compression for the backup SQL statement:

When mysqldump-hhostname-uusername-ppassword databasename | gzip> backupfile. SQL .gz is restored, most of the Restoration Methods on the Internet are gzip <backupfile. SQL .gz | mysql-uroot-ppassword database. However, the error message "error at line 1: unknown command '\? This is not a garbled problem.
Using gunzip, You can decompress gunzip <backupfile. SQL .gz | mysql-uroot-ppassword Database

The above is what I encountered at work. I hope to help my comrades who encountered this problem like me! Thank you!