i need help quick please
 

im just wondering if someone can help im trying to find out what command or character to use when you are viewing a screen and want to pause screen by screen..if someone can help please do so asap
thanks in advance

You can use the less command. Like this: ls -l /dev | less. You press the spacebar to see more, the ' b ' key to go back and the ' q ' to quit from ' less '. The ' | ' is the pipe symbol. You're piping the output of ' ls ' into ' less '. On my keyboard, it's a broken vertical line above the ' \ ' backslash.

When you are in a consle (plain text) window or a xterm in x then you can scroll back a few screens by holding shift and pressing page up or page down.

You can also use the up/down arrow keys to scroll a single line at a time with less. If you wanted to keep a reference on hand for easier viewing at a later date (or for editing) you can always ls -l > file.