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This article mainly explains "how to use the Linux exec command". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to use the Linux exec command.

Linux common command exec is a command used to invoke and execute instructions. The exec command is usually used in shell scripting programs, and other commands can be called. If the command is used in the current terminal, the terminal exits immediately after the specified command is executed.

Exec invokes and executes the specified command

Supplement the commands that the exec command uses to invoke and execute instructions. The exec command is usually used in shell scripting programs, and other commands can be called. If the command is used in the current terminal, the terminal exits immediately after the specified command is executed.

Syntax exec (option) (parameter) option-c: executes the specified command in an empty environment. Parameter instruction: the instruction to be executed and the corresponding parameters.

The example first uses the echo command to output the text "Linux C++" and enter the following command:

After echo Linux C++ # outputs the specified information and executes the above instructions, the following information is output:

Linux C++ # outputs the information, and then uses the exec command to invoke the echo command to output the same information, and compares the output. The input instruction is as follows:

After exec-c echo Linux C++ # calls the command to execute the above command, the output information is as follows:

Linux C++ # uses the specified instruction to output information by comparing the results of the two execution, the function is the same, even if the echo command is successfully called with the exec command.

Thank you for your reading, the above is the content of "how to use the Linux exec command", after the study of this article, I believe you have a deeper understanding of how to use the Linux exec command, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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