Which of the following commands is used to search for files by name?

The command that is used to search for files by name is the find command. It is widely used in Linux systems to locate files and directories based on various criteria, including their names. The syntax typically allows you to specify the name of the file you want to search for and the directory in which to begin the search. This flexibility makes find a powerful tool for users who need to locate files with specific characteristics or patterns within a filesystem.

Other options may pertain to searching in various contexts. For instance, grep is primarily used for searching text within files, rather than searching for files themselves. locate relies on a pre-built database of files on the system, which can be efficient but doesn't search in real-time. The 'search' command generally does not exist as a standard command in Linux for file searching, making it irrelevant in this context. Thus, find stands out as the direct and effective way to search for files by name.