How to output lines in file 1 if there is a line match with file 2?

Question

linux

How to output lines in file 1 if there is a line match with file 2?

File 1
1: Vasya
2: Petya
3: Kolya
4: Ivan

File 2
Vasya
Igor
Ivan

Required output:
1: Vasya
4: Ivan

Answer 1

fgrep -if ./file2.txt ./file1.txt
-i- case-insensitive search (if necessary)
-f- get a list of strings to search from the specified file, line by line