how to search for a file in linux terminal code example

Example 1: how to find a file in linux terminal

find /path/to/folder/ -iname *file_name_portion*

Example 2: search for files in linux terminal

find /path/to/folder/ -iname *file_name_portion*

#Example
find / -iname *test*

#Output

/downloads/test_2.txt
/downloads/test_1.csv
/home/ubuntu/first_test.txt

Example 3: find a file in linux terminal

find /home/username/ -name "*.err"