A vendor is transfering files via FTP to our location via FTP and claims that they did send us the files. Where can I find the FTP log files and what are they called?
Depends of your FTP server, but most log files are in
/var/log. Most servers just log errors and warning by default, so I'm not entirely sure you can find the log of file transfers since they would tend to take too much space.
You can use also
locate to find them in case you have an idea of what are they called, like