linux command to search a file in all subdirectories code example

Example 1: linux search all directories for file

find / -iname 'book1*'

Example 2: ubuntu terminal find file recursive

sudo find . -print | grep -i '.*[.]xml'

Example 3: linux 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\*