...
Testers and Test Leads can mark a test as Automated while writing a testcase and provide key pieces of information in there like the Script Name, its ID and the Path which will be used to kick it off (see ZBots ZBot Overview and how Automated testcases can be executed).
Here are some examples on the information to put in the Path field for autoamtion. Please refer to the help documentation of those respective tools in order to figure out how to run the scripts from the command line.
QTP
Use "c:\program files\HP\QuickTest Pro\bin\cmdrv.exe" -usr "c:\auto_tests\A_21\security.usr" where "security.usr" is the name of the QTP script created.
Selenium, WATIJ, Junit etc.
Use "c:\automation\selenium\runOnce.bat" where "runOnce.bat" is the name of the automation script.
Silktest
Use "c:\program files\silktest\partner.exe -r login.t" or "c:\program files\silktest\runtime.exe -r login.t" where "login.t" is the name of the Silktest script created.