“MySQL server has gone away”: This is an error when you tried to import a large file to MySQL/MariaDB. So, you can temporatly set max_allowed_packet by below guide:
Your file size (MB): X
Your file size (bytes): Y = X*1024*1024.
Example: X = 2GB => Y = 2,097,152,000,000
Your import commands likes this:
SET GLOBAL max_allowed_packet=2097152000000
mysql dbname < filename.sql;