Using linux wallet questions

Hi! I am a pretty newbie with linux wallets at all and found that no useful guide about common commands here
I could install and configure wallet easily and it works fine. I managed to receive some from my exchange and checked it locally. But I can not find an information regarding using t addresses
I used ./src/zcash-cli help and tried sendtoaddress command as referred to
But i got "command not found"
Why so poor information about using ZCASH wallet!!!
Where some samples using common t addresses!!!