Answer:
sudo grep "charlie" /var/log/vsftpd.log
Explanation:
Whenever the user becomes running and configured the FTP server within the following Server. That network generated a quite wide logging file, called vsftpd.log. Therefore the sudo grep "charlie" /var / log / vsftpd.log commands seems to be suitable towards searching the log document regarding user charlie operation.
So, the following command is correct according to the given statement.
