Logparser is a flexible command line utility that was initially written by Gabriele Giuseppini, a Microsoft employee, to automate tests for IIS logging. This starts printing when the "regular expression one" finds something, and stops when the "regular expression two" find the end of an interesting block. This will extract everything from line 1 million to line 2 million, and allow you to sift the output manually in less.Īnother example: $ perl -n -e 'print if ( /regex one/. (range flip-flop) operator makes for a nice selection mechanism to limit the crud you have to wade through.įor example: $ perl -n -e 'print if ( 1000000. See the "less" section of the answer above. (There is a famous saying – "less is more, more or less" – because "less" replaced the earlier Unix command "more", with the addition that you could scroll back up.) Searching and navigating under less is very similar to Vim, but there is no swap file and little RAM used. Why are you using editors to just look at a (large) file?
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The free version can not: process regex, filter files, synchronize timestamps, and save changed files. loxx (Windows) – Supports file following, highlighting, line numbers, huge files, regex, multiple files and views, and much more.BssEditor (Windows) – Handles large files and very long lines.EmEditor (Windows) – Handles very large text files nicely (officially up to 248 GB, but as much as 900 GB according to one report).
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In particular, Vim (Windows, macOS, Linux), Emacs (Windows, macOS, Linux), Notepad++ (Windows), Sublime Text (Windows, macOS, Linux), and VS Code (Windows, macOS, Linux) support large (~4 GB) files, assuming you have the RAM. Modern editors can handle surprisingly large files. It's one executable, barely 500 KB, but it still supports searching (with regexes), printing, a hex editor mode, and settings. Lister (Windows) – Very small and minimalist.Also supports file following, tabs, multifiles, bookmarks, search, plugins, and external tools. and display in a spreadsheet format) and the highlighter (show lines with certain words in certain colors). But its killer features are the columnizer (parse logs that are in CSV, JSONL, etc. LogExpert (Windows) – "A GUI replacement for tail." It's really a log file analyzer, not a large file viewer, and in one test it required 10 seconds and 700 MB of RAM to load a 250 MB file.But from a UI standpoint, it's rather minimal. It supports monitoring file changes (like tail), bookmarks, highlighting patterns using different colors, and has serious optimizations built in. Its main feature is regular expression search. klogg (Windows, macOS, Linux) – A maintained fork of glogg.Very fast, simple, and has small executable size. Also support file following and regex search. Supports horizontal and vertical split view. Large Text File Viewer (Windows) – Fully customizable theming (colors, fonts, word wrap, tab size).