The contents of that file will include all authentication messages for your server. Boost your Linux knowledge with our in-depth eight-page PDF guide. This is available for download at just $19.

What I want to do is monitor who is logging in. Every one of our clients has a static IP address that they connect from, a dedicated login ID, and a unique ssh key. Now monitoring auth.log for ...

With tail, you can view a Linux log file as the system writes to it in real time. So while you’re trying to troubleshoot that system, you can follow the syslog, the auth.log, faillog, kern.log ...