The difference between Shell, Console, terminal

In the previous chapters, we mentioned that the remote control of a TV set is also a kind of http://www.aliyun.com/zixun/aggregation/11432.html interface, which is a kind of shell.

But this concept is not accurate, the remote is only a tool to send instructions to the shell, the shell received the remote control issued instructions, the instructions to the system commands, the system to execute.

For example, we press the number key on the remote control 1, the remote control will switch to 1 channel instructions sent to the Shell,shell to convert the instructions to the system can recognize the Channel 1, the system to execute it, you can watch the 1 channel TV.

Usually each television has only one shell, for example, some television system has "picture in painting" function, then the shell has the corresponding function definition, you can through the remote control "painting" function key to open it. Assuming your TV does not have this feature, there is no corresponding functional definition in the shell. With a remote control with the "draw in picture" function, you are not able to use this feature even if the signal is compatible.

You can control the TV without the remote, assuming that your remote control is lost, you can also walk to the front of the TV and use the Control Panel on the machine to control it (equivalent to using the Linux console). But you must not like this way unless you want to exercise.

In Linux systems, because the graphics interface and console resolution are usually inconsistent, there is a delay in switching. For our Chinese users, the Chinese display under the console is also more troublesome. and console display content is usually not as comprehensive as the terminal display.

So we recommend that you use a terminal to execute the command, which feels like a remote control.