To delete multiple files in bulk on a Unix or Linux system, you can use the rm command followed by the names of the files you want to delete.
For example, to delete three files named "file1.txt", "file2.txt", and "file3.txt", you can use the following command:
$ rm file1.txt file2.txt file3.txt
You can also use wildcards to delete multiple files at once. For example, to delete all the .txt files in the current directory, you can use the following command:
$ rm *.txt
This will delete all the files in the current directory that have a .txt extension.
Note that the rm command permanently deletes the specified files and there is no way to recover them. Use caution when using the rm command.
For more advanced usage of the rm command, you can refer to the rm man page by running man rm on the command line.