DECLARE @pathName NVARCHAR(512)
DECLARE @h NVARCHAR(512) = DATEPART ( hh , GETDATE() );
DECLARE @m NVARCHAR(512) = DATEPART ( mi , GETDATE() );
DECLARE @s NVARCHAR(512) = DATEPART ( ss , GETDATE() );
DECLARE @myTime NVARCHAR(512) = @h + '-' + @m + '-' + @s;
SET @pathName = '/var/opt/mssql/Backups-LA2/LA2/Full-base/LA2_' + Convert(varchar(10), GETDATE(), 105) + '[' + @myTime + ']' + '.bak'
BACKUP DATABASE [LA2] TO DISK = @pathName WITH RETAINDAYS = 4, NOFORMAT, NOINIT, NAME = N'LA2_full', SKIP, NOREWIND, NOUNLOAD, STATS = 10
GO