To clear all aliases in the bash shell on Linux or Unix, you can use the unalias command with the -a option. This will remove all aliases that have been set in the current shell session.
For example, to clear all aliases in the current bash shell session, you can use the following command:
unalias -a
This will remove all aliases that have been set in the current shell session, but it will not delete the alias definitions from the .bashrc file. The .bashrc file is a configuration file that is run when the bash shell starts, and it usually contains a list of alias definitions that are set when the shell starts.
To delete the alias definitions from the .bashrc file, you will need to edit the file and remove the alias definitions. The .bashrc file is usually located in the home directory of the user, and you can edit it using a text editor such as nano or vi.
For example, to edit the .bashrc file using nano, you can use the following command:
nano ~/.bashrc
This will open the .bashrc file in the nano text editor. You can then search for the alias definitions and delete them. When you are finished, save the file and exit the text editor.
Note that these steps will only clear the aliases for the current user. If you want to clear the aliases for all users on the system, you will need to repeat these steps for each user.