Table of contents
LNAV
The Log File Navigator (lnav) is an advanced log file viewer for the console.
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Interactive Terminal UI
LNAV provides an interactive user interface within the terminal, allowing users to browse, search, and analyze log files efficiently without leaving the command line.
Automatic Log Format Detection
LNAV automatically detects and parses various log file formats, including those from syslog, Apache, MySQL, and many others, thus saving time and effort required for manual configuration.
Live Log Monitoring
LNAV supports live monitoring of log files, making it useful for real-time debugging and continuous monitoring scenarios.
SQL Queries
Users can run SQL queries on log data directly within LNAV, providing powerful and flexible ways to extract and analyze information.
Cross-Platform
LNAV is available on multiple platforms, including Linux, macOS, and FreeBSD, making it versatile for various development and operational environments.
Low Resource Usage
LNAV is lightweight, meaning it can run efficiently even on systems with limited resources.
Open Source
LNAV is open-source software, allowing for community contributions, transparency, and free use in various projects.
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Yes, LNAV is considered a good tool.
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Check the traffic stats of LNAV on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of LNAV on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of LNAV's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of LNAV on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about LNAV on Reddit. This can help you find out how popualr the product is and what people think about it.
>I made a CLI logs viewers and querier for my job, which is very useful but would have taken me a few days to write (~3k LoC) I recall The Mythical Man-Month stating a rough calculation that the average software developer writes about 10 net lines of new, production-ready code per day. For a tool like this going up an order of magnitude to about 100 lines of pretty good internal tooling seems reasonable. OP... - Source: Hacker News / 12 months ago
Thereโs a tool called lnav that will parse logfiles into a temporary SQLite database and allows to analyse them using SQL features: https://lnav.org/. - Source: Hacker News / almost 2 years ago
As others have kinda alluded to, it could be useful for testing TUI applications. I develop a logfile viewer for the terminal (https://lnav.org) and have a similar application[1] for testing, but it's a bit flaky. It produces/checks snapshots like [2]. I think the problems I run into are more around different versions of ncurses producing slightly different outputs. [1] - - Source: Hacker News / about 2 years ago
The Logfile Navigator (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... - Source: Hacker News / about 2 years ago
See https://lnav.org for a powerful mini-ETL CLI power tool; it embeds SQLite, supports ~every format, has great UX and easily handles a few million rows at a time. - Source: Hacker News / about 2 years ago
The code base seems like a good reference as a small Python project. My fav option in this class of apps: https://lnav.org/ It lets you use journalctl with pipes as requested here: https://github.com/Textualize/toolong/issues/4. - Source: Hacker News / over 2 years ago
For local development, I cannot recommend lnav[1] enough. Discovering this tool was a game changer in my day to day life. Adding comments, filtering in/out, prettify and analyse distribution is hard to live without now. I don't think a browser tool would fit in my workflow. I need to pipe the output to the tool. [1] https://lnav.org/. - Source: Hacker News / over 2 years ago
If it's just files, lnav [1] is pretty good. [1] https://lnav.org/. - Source: Hacker News / over 2 years ago
Https://lnav.org/ Is a good Linux command line tool in the same genre. - Source: Hacker News / over 2 years ago
This is really pretty - I do really wish for a good rust replacement for lnav[1] someday. 1: https://lnav.org/. - Source: Hacker News / over 2 years ago
Https://lnav.org/ has a feature that single handedly sold me on trying out the fantastic software: An SSH-reachable playground. It's right there above the fold on the first page: ssh://playground@demo.lnav.org I want to build a similar playground for people who want to get familiar with the tools my Shell Bling Ubuntu repo provides ( https://github.com/hiAndrewQuinn/shell-bling-ubuntu ). Ideally it consists of a... - Source: Hacker News / over 2 years ago
> all so that the same binary runs on multiple operating systems, which isnโt actually very useful. I like to mention my use case when this comes up: my log file viewer (https://lnav.org) uploads an agent to remote hosts in order to tail log files on that host[1]. While lnav itself is not built using cosmo, the agent is. So, it works on multiple OSs without having to compile and include multiple versions of the... - Source: Hacker News / over 2 years ago
The Logfile Navigator (https://lnav.org), a logfile viewer for the terminal. Started it in 2006 and have used it most every day since to view the logs of whatever software I was working on at the time. - Source: Hacker News / almost 3 years ago
I use an APE executable as an agent for communicating with remote hosts in the Logfile Navigator (https://lnav.org). While lnav itself is not built as an APE, the agent built into itself is. That agent is transferred to the remote when the user wants to read logs on that host. This way, there is no extra step to determine the type of OS or building in multiple versions of the executable. Here's a short blog... - Source: Hacker News / about 3 years ago
Https://lnav.org/ really whips the llama's ass. Source: about 3 years ago
I'm the author of the Logfile Navigator (https://lnav.org). It's C++ and was started in the mid-2000's. I started playing around writing a new version in Rust a few months ago, but haven't gotten back to it in a while. Source: about 3 years ago
I'd be interested in a native Mac app that does this. That said, lnav is quite powerful and reasonably easy to use and can grab a directory of log files from a remote server over SSH. Source: about 3 years ago
LNAV (https://lnav.org) is ideally suited for this kind of thing, with an embedded sqlite engine and what amounts to a local laptop-scale mini-ETL toolkit w/ a nice CLI. I've been recommending it for the last 7 years since I discovered this awesome little underappreciated util. - Source: Hacker News / over 3 years ago
I had 2 options on my mind: local ELK and lnav. I tried to google about how to quickly run ELK in Docker locally (I had no prior experience in setting ELK up), but haven't found good tutorials. I believe they exist, but I also was thinking about possible caveats. - Source: dev.to / over 3 years ago
May be more widely applicable for personal servers: lnav, an advanced log file viewer for the terminal: https://lnav.org/ It uses SQLite internally but can parse log files in many formats on the fly. C++, BSD license, discussed 1 month ago: https://news.ycombinator.com/item?id=34243520. - Source: Hacker News / over 3 years ago
Not sure if this is what you're looking for, but I came across this awesome little tool called lnav (Logfile Navigator) that might be of interest: https://lnav.org/. Source: over 3 years ago
LNAV, or the Logfile Navigator, has garnered attention and appreciation from a diverse community of users, primarily within the realms of IT management, development, and systems administration. It stands out as a tool adept at handling log management, monitoring, and analysis tasks, especially for small to moderate-scale IT environments. Below is a consolidated insight into the public opinion concerning LNAV, informed by various recent mentions and testimonials.
LNAV is recognized for its user-friendly terminal interface and real-time log data streaming capabilities. Its most prominent feature is the integration of an embedded SQLite engine, allowing users to analyze log files using SQL queries. This functionality enhances its utility in environments where real-time analytics of log data is crucial. The toolโs ability to merge, tail, and search through log files in a terminal setting makes it particularly valuable for those who prefer command-line interfaces over graphical dashboards.
The inclusion of advanced UX features, such as context-sensitive help and operation previews, aids users in crafting precise commands and queries. For instance, regex filtering previews allow users to see which lines will be affected by a command, thereby simplifying tasks that involve regular expressions. Additionally, LNAV supports lightweight data visualization through bar charting, further making it a versatile analytics tool.
As a tool, LNAV has been praised for its ease of use, even for those who may not be deeply technical. Its capability to run without requiring additional server setups is particularly appealing, as it operates directly on the existing server, thereby minimizing overhead and complexity. This makes it an accessible option for IT teams that lack extensive resources, distinguishing it from more complex, enterprise-level solutions.
When compared to peers such as klogg, glogg, and BareTail, LNAV receives favorable mentions for its robust feature set and performance. Users have highlighted its strengths in handling diverse log formats and the seamless integration of journalctl through piping capabilities, which enhances its adaptability to various log management needs. The toolโs open-source nature and BSD licensing also contribute to its appeal, especially among developers who value transparency and the ability to customize their tools.
Despite its many benefits, some users have identified areas for development. Challenges with differing ncurses outputs, as noted in testing of TUI applications, point to variability issues that may affect its consistency across different systems. Moreover, while LNAV has been well-received, there are wishes expressed within the community for a modern rewrite, possibly in Rust, that could further enhance its performance and maintainability.
LNAV maintains a distinguished position in the spectrum of log management tools as a potent, yet approachable solution for handling log data directly from the terminal. Its comprehensive feature set, combined with real-time analytics capabilities, makes it a go-to choice for developers and IT administrators seeking efficient, reliable log analysis without the encumbrance of more complex systems. Its continued development and community engagement suggest a promising future with room for innovation and improvement.
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