How to change the port when calling sqlcmd

According to this MSDN link, you'd use -S tcp:servername,32001.

Following solution is working for me in SQL Server 2008 and above.

sqlcmd -S "hostname or IP,port number" -U SA -P password

That's it: How to Connect to the Database Engine using sqlcmd. Something like this:

sqlcmd -S ComputerA,1691