Log File Viewer for the Terminal

(lnav.org)

130 points | by wiradikusuma 4 hours ago

10 comments

  • Sammi 21 minutes ago
    This looks great.

    I've been using klogg and if you're more into GUI's then I think it's the best there is. It opens and searches in log files of many gigabytes with easy. It's a simple and clean multiplatform QT app.

    https://github.com/variar/klogg

    • graemep 11 minutes ago
      The problem with GUIs is that AFAIK they need to be installed on the machine the logs you are reading are on so a heavy install on a server.
  • guessmyname 3 hours ago
    Oh yeah! lnav is famous. I remember using it like a decade ago to monitor an array of web servers while at GoDaddy; good ol' times.

    First commit is from Sep 13, 2009: https://github.com/tstack/lnav/commit/b4ec432515e95e86ec9d71... . Woah! we’re old.

    This is what the UX looked like back in the day: https://github.com/tstack/lnav/commit/bce2caa654160518ec11f6...

    • boomskats 2 hours ago
      Wow, the GitHub mobile app doesn't preview PNGs. TIL
      • ifh-hn 1 hour ago
        GitHub website does on mobile.
  • brunosutic 2 hours ago
    I tried lnav about 7-8 years ago and as a terminal junkie I really liked the features.

    The only breaking thing was a huge (almost bloated) memory consumption. At that time lnav basically just kept everything in memory. Does anyone did that change?

    • xx_ns 2 hours ago
      According to the linked homepage, the memory usage seems decent (few hundred megs for most use cases when working with a 3.3G logfile). There's a screenshot with various tasks and what the peak memory usage is.

      At some point you need to keep quite a large context in memory to have both decent performance and useful features (that aren't unbearably slow to use). lnav seems to land at a reasonable middle ground.

  • elcapitan 1 hour ago
    > ssh playground@demo.lnav.org

    Really appreciate this way to demo it quickly, very nice!

  • __bax 1 hour ago
    Must have tool!
  • p0w3n3d 4 hours ago
    This is almost the thing I want and need. What I need is some sort of TUI grafana - Json log splitter/organizer/finder
    • aledevv 28 minutes ago
      In my opinion logfile navigator is much better than grafana, I use grafana to view a lot of microservices docker logs, but it's too tedious for me (even if depends on your specific use case).

      This one, on the other hand, is cleaner and lets you find what you're looking for quickly. And, last but not least, is much lighter.

    • makapuf 2 hours ago
      Currently working exactly on that https://gitlab.com/makapuf/treewalker (even if it could always use some love)
    • dima55 3 hours ago
      I use vnlog and feedgnuplot to massage and plot data on the console all the time. It's even less than a tui, but might be what you want.
      • dloss 2 hours ago
        If you're fine with CLIs, maybe my Kelora project is worth a look. It's a very flexible log processor with built-in scripting: https://kelora.dev
  • asmosoinio 3 hours ago
    Looks very useful, will give it a go.

    This resonates with my use of grep+less: https://github.com/tstack/lnav?tab=readme-ov-file#why-not-ju...

  • vincentabolarin 53 minutes ago
    This looks genuinely useful.
  • steveharing1 2 hours ago
    I was looking for something like this, Appreciate it!
  • yagelar 54 minutes ago
    very nice, definitely will use it