/*use "sa" user*/

/*backup*/
BACKUP DATABASE [servicedesk] TO DISK = N'/var/opt/mssql/data/SDDB20230221.BAK';

/*restore*/
ALTER DATABASE [servicedesk] SET OFFLINE WITH ROLLBACK IMMEDIATE;
RESTORE DATABASE [servicedesk] FROM DISK = N'/var/opt/mssql/data/SDDB20230221.BAK' WITH REPLACE;

/*go online after restore*/
ALTER DATABASE [servicedesk] SET ONLINE;