=== Installing ODBC driver manager (top level driver) ===

install '''unixODBC driver manager''' for Linux platform (WIN32 already have ODBC driver manager)
{{{
yum install unixODBC
}}}
tested configuration: 
 *unixODBC-2.2.9-1 for Fedora Core 3
 *unixODBC-2.2.11-1 for Fedora Core 4

=== install ODBC driver for specific database (low level driver) ===
 *Linux/Postgres (do not use packages from '''yum''', they are too old for Fedora Core 3/4, for 5-7 you can try but make sure that it will install '''08'''.xxx version)
There is a source rpm on sam:/u2/programs/databases_and_odbc/postgresql-odbc-08.01.0200-1.2.src.rpm
for Fedora Core 3 or 4 there are prebuild odbc on sam (Core 3) and fuzzy (Core 4).
Just mount them somewhere somehow and do make install. Otherwise have a FUN ;-)
{{{
on Fedora Core 3
cd sam:/u2/vlad/psodbc/psqlodbc-08.01.0200
make install
on Fedora Core 4
cd fuzzy:/home/postgres/psqlodbc-08.01.0200
make install
}}}

 *Win32 connected to Linux/PostgreSQL server: 
  download driver and other stuff from http://pgfoundry.org/projects/pgw32cli/, then follow instructions

 *Win32/MSSQL and */Oracle have drivers included in server or client packages

Check http://www.savelono.com/linux/how-to-configure-linux-odbc-connections-for-ms-sql.html for ms-sql connection with freetds