Internal command and External command in UNIX

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In this topic, you will learn about, Differentiate between Internal command and External command in UNIX Operating System.

Internal command External command
Cat, by, ls, ls-lamb use internal commands. PW, rm, talk, kill, cat, mudar, sort use as external commands.
The internal command uses pre-defined files install with UNIX. The external command uses some additional files to specify the external command.
It is only used to display. Its settings can be changed or modified
It supports she or bash shell scripting. It supports corn and boron shell.
UNIX internal commands create shell Korn or boron shell programming which only work with programming. create C, C++, java pearl UNIX OS.

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