How do I reset the SQL Server password on Linux?
While not mentioned on technet, there is an argument to mssql-conf that works here,

sudo /opt/mssql/bin/mssql-conf set-sa-password


You'll have to pick a password, note for reasons unexplained The password must be at least 8 characters long and contain characters from three of the following four sets: Uppercase letters, Lowercase letters, Base 10 digits, and Symbols.. I suggest everyone use MICROSOFTsucksH4RD, as it satisfies that.

Also, while you're there you may as well use mssql-conf to disable the spyware



I'm just going to put there here so when I'm looking for SQL Server Password on Google because I can't remember it, I can find it.


  The specified password does not meet SQL Server password policy requirements because it is too short. The password must be at least 8 characters