If you are using the graphical user interface (GUI), then you will likely be using KDE. If so, then you can quickly search for files in KDE as well.
By going to the main menu and selecting Find Files, you will open a dialog box.
Once you see the dialog box, it should be self-explanatory. Instead of adding the commands you need (like find, whereis, and which), the Find Files dialog box will ask you what you are looking for (and where) and search that exact location for what you want.
This dialog box contains the same features of the command-line versions of find and grep. KDE has provided a GUI for these functions that make them easier to use. Again, you may prefer to use the shell prompt. The shell prompt helps you ...