A provides an interface to run a, which again is an interface to access your operating system functions. Terminals used to be real machines, e.g. A monitor with a keyboard attached, which sent your keystrokes to the actual computer at the other end, and receiving output from this computer. For example, the famous: Nowadays, this is emulated by those applications, like the Terminal.app on OS X, or GNOME Terminal for the GNOME graphical interface on Linux distributions. As it's decoupled from the shell that you can run (e.g.,.), you are free to use any other terminal emulator. For example, on OS X, you can use, which offers a bit more than the normal terminal application. As the terminal is the bridge between your GUI and the text-only shell, its functionality should go beyond accepting keyboard input and displaying output from the shell. A terminal should supply you with means of: • copying and pasting to the GUI • sending special commands to the shell (so called; your terminal will for example map Cmd - Right Arrow to an appropriate shell sequence to go to the end of the line*) • allowing other shortcuts with hotkeys • allowing the shell to track the mouse • allowing multiple tabs with different shells running at the same time • allowing you to drag a file icon to the shell to get its real path • notifying the GUI of events (such as a blinking screen, or ) • etc. To sum it up: Different terminals offer different functionality with regards to how they interact with your operating system on the one hand, and the shell on the other hand. You can find a on Wikipedia. I was able to reach very close to 200 MB/s read while writes topped out around 185 MB/s. Seagate backup plus portable drive. The plastic appears to be ABS, so it's quite durable, but at the same time, it scratches easily and gathers dust and fingerprints like a magnet thanks to its glossy finish. On the performance side, the Backup Plus performed quite well. Many Mac OS X users won't have any need to use the Unix shell that underlies their graphical interface. Some will likely disdain the very idea, but for those adventurous enough to try it, a whole new world awaits. That being said, there isn't an important difference. Most people set up terminals to their liking, e.g. Some like a transparent background, whereas others don't. Some like them to display their shell black on white, others rather like it green on black.** Some terminals allow you to set up different keyboard shortcut profiles, or even other profiles that launch different shells on startup, with a different windows size, etc. * Note that this is a rather simplified statement. The terminal just needs to find a way to map special keys – especially on Macs, where there's a Command key – to commands a shell can understand. ** This is also a functionality of the terminal: Displaying colors. You can actually tweak your terminal to show stuff the shell intended to be green as red instead. It's primarily a matter of customization. Note: the terminal is a wrapper program which runs the shell. The term derives from times where it still was a physical device (keyboard). The shell (or command interpreter) runs commands and returns the results. You basically can run the same shells on both operating systems: • bash • csh • ksh • zsh shells of the mentioned operating systems (in question tags) are all using the same core commands because they are UNIX-like and have to fulfill the standard. This is why you will feel familiar on both OSs.
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