Now let’s go through some basic shell commands to see what is happening. The macOS X comes with the bash shell (Bourne Again shell), but you can change your shell to csh (C shell), zsh (Z shell), ksh (Korn Shell), tcsh (TENEX C Shell), etc. It allows us to control command-line tools. Shell is an environment where we can run our shell commands and shell scripts. This Terminal provides you with the shell. To be able to run these commands, we need to use the Terminal application. mkdir test cd test for i in do mkdir "$i" done For example, you can run text commands to create 100 folders, but it will take more time and effort to achieve the same result via a GUI application. It’s a powerful way to interact with a computer. Even though GUI applications remain popular among vast users, a command-line interface gives users more control over their computer by running text commands. Most computer users interact via a graphical user interface because it’s an easy way to manipulate a machine.
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