I want to write a script to check if a unix box say abc.tdc.cin.net can be connected or not on certain port say 22. right know i have to telnet them manually from DOS prompt and if it is successful then isay it is connected.

Also to check Database connectivity I am using tnsping From DOS prompt.
i need some guidance like should the script be written shell or perl and what commands will be helpful to do that. I have like 40 DB and 20 Unix boxes which i need to check daily.