The problem can be to find a SQL client compatible with old versions of MS SQL on Linux.
Lot of SQL clients that are compatible with MS SQL are in fact compatible with MS SQL Server 2005+ but not 2003/2000.
sqsh comes to the rescue.
Example of execution
Connect to shell (one time)
$ sqsh -U sa -P password -S 10.0.0.1:1433 -D mydb
sqsh-18.104.22.168 Copyright (C) 1995-2001 Scott C. Gray
Portions Copyright (C) 2004-2014 Michael Peppler and Martin Wesdorp
This is free software with ABSOLUTELY NO WARRANTY
For more information type '\warranty'
go -m pretty.
Alternatively it is possible to not use any option and configure
~/.sqshrc but is far less handy/versatile: https://www.adampalmer.me/iodigitalsec/2013/08/10/accessing-and-hacking-mssql-from-backtrack-linux/