The Log File Navigator, lnav for short, is an advanced log file viewer for the small-scale. It is a terminal application that can understand your log files and make it easy for you to find problems with little to no setup. Log messages from different files are collated together into a single view. Automatic detection of log format. Automatic decompression of GZip and BZip2 files. Filter log messages based on regular expressions. Use SQL to analyze your logs.

Even works with systemfail's journals.