lnav/docs/tutorials/tutorial1/index.md

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tutorial1

move-to-error move-to-warning description view_ptr view_value notification comment Move to an error /top 6 Press e/Shift+E to move through the errors You found the error! [Log formats](https://docs.lnav.org/en/latest/formats.html#format-file-reference) can define the log levels for a given message. The [theme](https://docs.lnav.org/en/latest/config.html#theme-definitions) defines how the levels are displayed. description notification view_ptr view_value comment Move to a warning Press w/Shift+W to move through the warnings /top 3 You found the warning! The scrollbar on the right is highlighted to show the position of <span class="-lnav_log-level-styles_warning">warnings</span> and <span class="-lnav_log-level-styles_error">errors</span> in this view. search-for-term move-to-next-hit move-right description notification view_ptr view_value Search for something Press / to search for '1AF9...' /search 1AF9293A-F42D-4318-BCDF-60234B240955 description notification view_ptr view_value comment Move to the next hit Press n/Shift+N to move through the search hits /top 53 The matching text in a search is highlighted in <span class="-lnav_styles_search">reverse-video</span>. However, the text is not always on-screen, so the bar on the left will also be highlighted. You can then press `>` to move right to the next (horizontal) search hit. Pressing `<` will move left to the previous (horizontal) hit or all the way back to the start of the line. description notification view_ptr view_value Move to the right Press > to move horizontally to view the search hit /left 150

Tutorial 1

Welcome to the first interactive lnav tutorial!

This tutorial will guide you through the basics of navigating log files.

Step 1

Finding errors quickly is one of the main use-cases for lnav. To make that quick and easy, lnav parses the log messages in log files as they are loaded and builds indexes of the errors and warnings. You can then use the following hotkeys to jump to them in the log view:

Key	Action
e	Move to the next error
Shift+E	Move to the previous error
w	Move to the next warning
Shift+W	Move to the previous warning

To complete this step in the tutorial, you'll need to navigate to the errors and warnings in the sample log file. You can check the upper-right status bar for tips on what you need to do next. Now, press q to switch to the log view and begin navigating the sample log file.

Step 2

To search for text in files, you can press / to enter the search prompt. To make it easier to search for text that is on-screen, you can press TAB to complete values that are shown on screen. For example, to search for the UUID "1AF9293A-F42D-4318-BCDF-60234B240955" that is in one of the error messages, you can enter "1AF9" and then press TAB to complete the rest of the UUID.

Press q to switch to the log view and try searching for the UUID.

Conclusion

That's all for now, visit https://lnav.org/downloads to find how to download/install a copy of lnav for your system. The full documentation is available at https://docs.lnav.org.

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The source for this tutorial is available here:

https://github.com/tstack/lnav/tree/master/docs/tutorial/tutorial1