There's some Munin plugins use logtail in cpanel, but it's not installed on the server. I can't find how to install it. Anyone has experience with this? I am using CentOS 5. Thanks.
You will need to install the logtail RPM manually from a trusted source, or install the logcheck RPM from a trusted source (logcheck includes logtail from what I understand). These are system packages not associated with cPanel. If you search for these applications on a search engine you should be able to find installation instructions.