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Editor to share with you how to use the unalias 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 command unalias command is used to delete aliases. Unalias is a built-in shell directive, and alias settings can be deleted.

Unalias removes aliases set by alias

Summary unalias [- a] name [name...] The main purpose is to delete one or more aliases.

Delete all defined aliases.

Option-a: delete all defined aliases. Parameter name: specifies one or more defined aliases to delete.

The return value unalias returns true unless the alias you want to delete is not defined.

Example # remove all defined aliases unalias-a # Delete defined aliases (assuming the following aliases exist in the current environment) the alias to be deleted by unalias vi unalias ls grep error usage is not defined.

The name parameter is not passed when the-an option is not used.

Note when executing the script, please note:

If the bash script executed with the source command executes the alias or unalias command, it may affect the alias setting of the terminal environment, and the alias setting of the terminal environment may also change the running result.

Bash scripts called through sh or scripts that the current user has execution permission to run directly are not affected by the alias of the terminal environment.

To view and set aliases, check the alias command.

This command is a bash built-in command. For help, please see the help command.

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