The Logfile Navigator (https://lnav.org https://lnav.org) is a log file viewer/merger/tailer for the terminal. It has some advanced UX features, like showing p

The Logfile Navigator (https://lnav.org https://lnav.org) is a log file viewer/merger/tailer for the terminal. It has some advanced UX features, like showing previews of operations and displaying context sensitive help. For example, the preview for filtering out logs by regex is to highlight the lines that will be hidden in red. This can make crafting the right regex a bit easier since the preview updates as you type. lnav also has some simple bar charting abilities, so you can visualize the results of SQL queries made against the log messages.