UNIX/Linux

Action	Command
List directory contents    long listing    list all files (including hidden)	ls ls -l ls -a
Change directory    go up one level    jump to home directory	cd <desired directory> cd .. cd
Copy file	cp <source> <destination>
Move file	mv <source> <destination>
Remove file	rm <filename>
Create new directory	mkdir <directory name>
Remove directory	rmdir <directory name>

ROOT

ROOT syntax is interpreted C++. Everything will make sense if you know C++, but will be quite confusing if you don't.  If you have never used C++, it might be helpful to look at this introductory C++ tutorial.   

In the following table, I give the full C++ form of the commands (these will work in compiled mode). There are also abbreviated versions which may be used on the ROOT command line, but it's a bad idea to get too comfortable with these, as they will not work in C++ outside of ROOT.

Action	Command
Quit ROOT    (If ROOT is unresponsive, start adding "q"s)       Really quit ROOT       QUIT ROOT, I mean it!!!	.q     .qqq   .qqqqq
Load a file	TFile *f = new TFile("file.root");
View contents of file	f->ls();
Create histogram "h1" with 100 bins,   ranging from 0 to 5.	TH1F *h1 = new TH1F("h1", "My histogram", 100, 0.0, 5.0);
Draw histogram "h1"	h1->Draw();
Close file	f->Close();