Tham khảo tài liệu 'suse linux 10 for dummies phần 3', công nghệ thông tin, hệ điều hành phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 48 Part I Getting to Know SUSE_ the one shown in Figure 3-7. That s a terminal window and it works just like an old-fashioned terminal. A shell program is running and ready to accept any text that you type. You type text press Enter and something happens depending on what you typed . In GNOME choose Applications1 System1 Terminal1 tGnome Terminal. That should then open up a terminal window. Figure 3-7 You can type Linux commands at the shell prompt in a terminal window. The prompt that you see depends on the shell that runs in that terminal window. The default Linux shell is called bash. Bash understands a whole host of standard Linux commands which you can use to look at files go from one directory to another see what programs are running and who else is logged in and a whole lot more. In addition to the Linux commands bash can run any program stored in an executable file. Bash can also execute shell scripts text files that contain Linux commands. Understanding shell commands Because a shell interprets what you type knowing how the shell figures out the text that you enter is important. All shell commands have this general format command optionl option2 . optionN Such a single line of commands is commonly called a command line. On a command line you enter a command followed by one or more optional parameters Chapter 3 Starting SUSE for the First Time 49 or arguments . Such command line options or command line arguments help you specify what you want the command to do. One basic rule is that you have to use a space or a tab to separate the command from the options. You also must separate options with a space or a tab. If you want to use an option that contains embedded spaces you have to put that option inside quotation marks. For example to search for two words of text in the password file I enter the following grep command grep is one of those cryptic commands used to search for text in files grep SSH .
