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Editor to share with you how to use the source command in Linux, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Linux common commands the source command is a built-in shell command that reads and executes commands from files in the current shell session.

Source reads and executes commands from the specified file in the current Shell environment.

Summary source filename [arguments]

Mainly use the execution file and load variables and functions from the file to the execution environment

Parameter filename: the file to be executed

Arguments (optional): parameters passed to the file

Return value source returns the return value of the last command in the file. If the file cannot be read, it will fail.

The error usage file cannot be found in $PATH.

The file is not given.

Example during the execution of some tools, the environment variable settings are exported to a file in the form of "export XXX=XXXXXX" or "declare XXX=XXXXXX", and then the contents of the file are loaded into the execution environment with source.

Read and execute the / root/.bash_profile file.

[root@localhost] # source ~ /. What is the difference between bash_profileQ&AQ:source and sh in terms of executing files?

The execution of A:sh is in the sub-shell, and source will load the variables and functions of the executed file into the current terminal environment (excluding the variables modified by local in the function, etc.). It is recommended that you refer to the knowledge section of the export command.

Note that this command is a bash built-in command. For help, please see the help command.

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