grep With Multiword Strings
To find a pattern that is more than one word long, enclose the string with single or double quotation marks.
$ grep “Louisa May” extensions
Louisa May Alcott x74236
The grep command can search for a string in groups of files. When it finds a pattern that matches in more than one file, it prints the name of the file, followed by a colon, then the line matching the pattern.
$ grep ar *
alaska:Alaska is the largest state in the United States.
wilde:book. Books are well written or badly written.