Linux grep: Find Lines with Specific Pattern (Uppercase, Lowercase, Comma, Uppercase)

To find lines containing an uppercase letter, followed by four lowercase letters, a comma, spaces, and another uppercase letter in Linux, use the following grep command:

grep '[A-Z][a-z]{4},[[:space:]]*[A-Z]' filename

This command uses regular expressions to match the desired pattern:

• [A-Z]: Matches any uppercase letter.* [a-z]{4}: Matches four lowercase letters.* ,: Matches a comma.* [[:space:]]*: Matches any number of spaces.* [A-Z]: Matches another uppercase letter.

Replace filename with the name of the file you want to search. This command will output all lines that contain the specified pattern.