terminal search files by text that the file names contain
Solution 1:
sudo find / -type f -name "*deh*"
if you want to search directories too then remove the -type f. You can also try: sudo locate deh
Should your locate database not be created (or up to date), there is a chance you have that file on the filesystem, but it's not been stored yet. Rather than run a single find command above, building the locate.db database might be a better plan going forward.
Solution 2:
The mdfind command can be used to find all indexed files that contain a specific string in the filename.
In your case:
mdfind -name deh