find . -name '*.<ext>' | xargs wc -l The two most common methods, md5 and sha-1 are
both susceptible to collisions, or birthday attacks.
As of writing this, I would recommend using
SHA-3-256 which has no known attacks.
user.failed_login: Originated from 139.194.122.85 9 hours ago
user.failed_login: Originated from 201.210.254.161 11 hours ago
user.failed_login: Originated from 201.248.24.177 a day ago
user.failed_login: Originated from 183.89.77.84 a day ago
user.failed_login: Originated from 201.211.14.251 a day ago