Need explanation for multiple I/O redirection operators.
Ok, so I'm obviously a shell newbie, so please forgive me if this is a stupid question. As it goes, I've understood the basic I/O redirection but need some explanation about 2 or 3 operators grouped together that I've seen people use. I'll try to explain my level of understanding this way-
1. ">" = Redirect Output
2. "<" = Redirect Input
3. "<<" = Here document used in conjunction with a label
4. ">>" = ???
5. "<<<" = ???
6. ">>>" = ???
Please understand my ignorance and explain the situation to me.