how to search a file in ubuntu using terminal code example

Example 1: terminal how to find a file name

find / -name NAME.EXTENSION

Example 2: ubuntu search file in specific folder

// Using backslash and asterisk (\*) at the end will search for all files that start with your search term (in this case "readme"). So you would also be able to find "readme2" etc. 
find . -name readme\*