lnav

Terminal log file navigator that merges, indexes, and lets you query logs with SQL.

Desktopfree

lnav is a free, open-source terminal log file viewer that automatically detects log formats, merges multiple files by time, and tails them live. It builds an index of errors and warnings, supports regex search and filtering, and lets users analyze log messages with embedded SQL queries. Aimed at sysadmins and developers who need to navigate large or mixed-format log files from the command line.

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