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‎assets/commands/index.txt‎

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qemu-system-riscv64.md
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qemu-system-x86_64.md
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qemu.md
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qgis.md
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qjoypad.md
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qm-agent.md
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qm-cleanup.md
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spottopgm.md
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spring.md
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sprio.md
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sprof.md
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sprofile.md
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sputoppm.md
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sq.md
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steamos-select-branch.md
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steamos-session-select.md
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steamos-update.md
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steamosctl.md
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steghide.md
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stegsnow.md
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step-ca.md

‎assets/commands/lightpanda.md‎

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# TAGLINE
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Headless browser designed for AI and automation
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# TLDR
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**Fetch a URL** and dump the rendered HTML to stdout
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```lightpanda fetch --dump html [url]```
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**Fetch a URL** and output as **markdown**
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```lightpanda fetch --dump markdown [url]```
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**Start a CDP server** on the default host and port
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```lightpanda serve```
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**Start a CDP server** on a specific host and port
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```lightpanda serve --host [127.0.0.1] --port [9222]```
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**Fetch a URL** while obeying robots.txt
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```lightpanda fetch --obey_robots --dump html [url]```
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**Fetch a URL** through an HTTP proxy
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```lightpanda fetch --http_proxy [proxy_host:port] --dump html [url]```
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# SYNOPSIS
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**lightpanda** _command_ [_options_] [_url_]
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# PARAMETERS
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**fetch**
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> Fetch a URL, execute JavaScript, and output the rendered page content to stdout.
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**serve**
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> Start a Chrome DevTools Protocol (CDP) server for remote automation via Playwright, Puppeteer, or raw CDP clients.
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**help**
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> Display available commands and options.
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**--dump** _html_|_markdown_
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> Output format for the fetched page. Use **html** for rendered HTML or **markdown** for a Markdown conversion. (fetch only)
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**--with_base**
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> Add a **\<base\>** tag in the dumped output. (fetch only)
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**--host** _address_
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> Host address for the CDP server. Default **127.0.0.1**. (serve only)
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**--port** _port_
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> Port for the CDP server. Default **9222**. (serve only)
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**--timeout** _seconds_
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> Inactivity timeout in seconds before disconnecting clients. Default **10**. (serve only)
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**--obey_robots**
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> Fetch and obey the robots.txt of the target web pages.
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**--http_proxy** _host:port_
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> HTTP proxy to use for all requests. Supports optional **username:password** for basic authentication.
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**--http_timeout** _milliseconds_
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> Maximum time in milliseconds the transfer is allowed to complete. **0** means no timeout. Default **10000**.
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**--log_level** _level_
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> Set logging verbosity. Default **info**. Use **debug** for detailed output.
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**--log_format** _format_
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> Set log output format. Use **pretty** for human-readable output.
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# DESCRIPTION
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**Lightpanda** is an open-source headless browser built from scratch in **Zig** with the **V8** JavaScript engine, purpose-built for AI agents, web scraping, LLM training, and test automation. Unlike headless modes of traditional browsers, Lightpanda skips graphical rendering entirely, focusing only on DOM construction and JavaScript execution.
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It exposes a **Chrome DevTools Protocol** (CDP) endpoint, making it compatible with existing automation tools like **Playwright**, **Puppeteer**, and **chromedp** as a drop-in replacement for headless Chrome. The **fetch** command retrieves a single URL and dumps the rendered page, while **serve** launches a persistent CDP server for remote browser control.
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Lightpanda achieves **9x less memory usage** and **11x faster execution** compared to headless Chrome, making it particularly suited for high-volume scraping and automation workloads.
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# CAVEATS
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Lightpanda is in **beta** and does not yet implement the full web platform. Complex web applications that rely on advanced CSS layout, canvas, WebGL, or certain newer Web APIs may not work correctly. Windows is not natively supported; use WSL instead. As a non-Chromium browser, some sites with browser fingerprinting may behave differently.
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# HISTORY
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Lightpanda was created by **Francis** and **Pierre**, who previously worked on large-scale web scraping using headless Chrome and found it too resource-heavy for high-volume workloads. They spent over **two years** building a headless browser from scratch in **Zig**, choosing the language for its low-level control and performance characteristics. The project was publicly announced on **Hacker News in early 2025** and released as open source under the **AGPL-3.0** license.
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# SEE ALSO
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[chromium](/man/chromium)(1), [curl](/man/curl)(1), [wget](/man/wget)(1), [puppeteer](/man/puppeteer)(1)

‎assets/commands/qgis.md‎

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# TAGLINE
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Open-source Geographic Information System
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# TLDR
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**Launch QGIS**
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```qgis```
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**Open a specific project file**
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```qgis --project [path/to/project.qgs]```
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**Open QGIS with specific layers**
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```qgis [path/to/file.shp] [path/to/raster.tif]```
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**Export a map snapshot** to an image file
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```qgis --snapshot [output.png] --width [1024] --height [768] --project [project.qgs]```
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**Launch without splash screen** and without plugins
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```qgis --nologo --noplugins```
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**Export project layers to DXF**
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```qgis --dxf-export [output.dxf] --project [project.qgs]```
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**Use a specific user profile**
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```qgis --profile [profilename]```
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**Run a Python script on startup**
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```qgis --code [path/to/script.py]```
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# SYNOPSIS
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**qgis** [_options_] [_file_ ...]
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# PARAMETERS
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**-p**, **--project** _projectfile_
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> Load the given QGIS project file.
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**-s**, **--snapshot** _filename_
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> Emit a snapshot of loaded datasets to the given image file.
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**-w**, **--width** _width_
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> Width of snapshot to emit.
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**-h**, **--height** _height_
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> Height of snapshot to emit.
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**-e**, **--extent** _xmin,ymin,xmax,ymax_
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> Set initial map extent.
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**-n**, **--nologo**
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> Hide the splash screen on startup.
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**-V**, **--noversioncheck**
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> Don't check for new version at startup.
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**-P**, **--noplugins**
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> Don't restore plugins on startup.
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**--nopython**
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> Disable Python support entirely.
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**-B**, **--skipbadlayers**
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> Don't prompt for missing layers.
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**-C**, **--nocustomization**
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> Don't apply GUI customization.
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**-z**, **--customizationfile** _path_
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> Use given ini file as GUI customization.
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**-f**, **--code** _path_
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> Run given Python file on load.
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**--profile** _name_
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> Load a named profile from the profiles folder.
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**-S**, **--profiles-path** _path_
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> Path to store user profile folders.
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**-l**, **--lang** _language_
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> Use specified language for the interface.
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**-d**, **--defaultui**
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> Reset user UI settings to default.
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**--hide-browser**
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> Hide the browser widget.
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**--dxf-export** _filename.dxf_
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> Emit DXF output of loaded datasets.
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**--dxf-extent** _xmin,ymin,xmax,ymax_
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> Set extent for DXF export.
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**--dxf-symbology-mode** _mode_
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> Symbology mode for DXF export: none, symbollayer, or feature.
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**-v**, **--version**
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> Display version information and exit.
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**--help**
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> Display help text.
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# DESCRIPTION
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**QGIS** is a cross-platform, free and open-source Geographic Information System licensed under the GNU GPLv2+. It supports viewing, editing, and analysis of geospatial data. Written primarily in C++ using the Qt framework, it features extensive Python plugin support.
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QGIS handles vector formats (Shapefiles, GeoJSON, GML, KML, GeoPackage, PostGIS, and all OGR-supported formats), raster formats (GeoTIFF, ERDAS IMG, and all GDAL-supported formats), and database sources. It integrates with GRASS GIS for advanced analytical functions and uses GDAL/OGR for data format translation. Features include map composition, spatial analysis, digitizing, geoprocessing, and a rich plugin ecosystem.
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For headless or batch processing, use the companion tool **qgis_process** instead.
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# CONFIGURATION
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User settings stored in **~/.config/QGIS/qgis.conf**. QGIS supports multiple user profiles, each with separate settings, plugins, and project templates. Use **--profile** to switch between profiles or **--profiles-path** to specify a custom profiles directory.
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# CAVEATS
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QGIS is primarily a GUI application; command-line usage is limited to launching with options, taking snapshots, and DXF export. Python plugins may affect startup time; use **--noplugins** or **--nopython** for faster launches. Large projects with many layers can consume significant memory. The **--configpath** option from QGIS 2.x was replaced by **--profiles-path** in QGIS 3.x.
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# HISTORY
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Development began in **February 2002** by **Gary Sherman** as **Quantum GIS**, initially a simple PostGIS data viewer for Linux. The first public release came in **July 2002**. It became an **OSGeo** incubator project in **2007**, and version 1.0 was released in **January 2009**. In **September 2013**, version 2.0 was released and the project was officially renamed from Quantum GIS to **QGIS**. Gary Sherman received the **Sol Katz Award** for open-source GIS contributions in **2014**.
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# SEE ALSO
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[gdalinfo](/man/gdalinfo)(1), [ogr2ogr](/man/ogr2ogr)(1), [ogrinfo](/man/ogrinfo)(1), [gdalwarp](/man/gdalwarp)(1), [gdal_translate](/man/gdal_translate)(1)

‎assets/commands/sprof.md‎

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# TAGLINE
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Read and display shared object profiling data
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# TLDR
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**Set up profiling** for a shared library by running a program with profiling enabled
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```LD_PROFILE=[libfoo.so.1] LD_PROFILE_OUTPUT=[/tmp/prof] [./myprogram]```
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**Display flat profile and call graph** (default output)
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```sprof [libfoo.so.1] [libfoo.so.1.profile]```
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**Display only the flat profile**
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```sprof -p [libfoo.so.1] [libfoo.so.1.profile]```
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**Display only the call graph**
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```sprof -q [libfoo.so.1] [libfoo.so.1.profile]```
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**Display call pairs**
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```sprof -c [libfoo.so.1] [libfoo.so.1.profile]```
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# SYNOPSIS
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**sprof** [_option_ ...] _shared-object-path_ [_profile-data-path_]
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# PARAMETERS
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**-c**, **--call-pairs**
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> Print a list of pairs of call paths for the interfaces exported by the shared object, along with the number of times each path is used.
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**-p**, **--flat-profile**
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> Generate a flat profile of all of the functions in the monitored object, with counts and ticks.
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**-q**, **--graph**
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> Generate a call graph.
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**-?**, **--help**
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> Display a summary of command-line options and arguments and exit.
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**--usage**
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> Display a short usage message and exit.
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**-V**, **--version**
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> Display the program version and exit.
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# DESCRIPTION
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**sprof** displays a profiling summary for a shared object (shared library) specified as its first command-line argument. The profiling summary is created using previously generated profiling data in the optional second argument. If the profiling data path is omitted, sprof looks for a file named **\<soname\>.profile** in the current directory.
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Profiling data is generated by setting the **LD_PROFILE** environment variable to the soname of the shared library and optionally **LD_PROFILE_OUTPUT** to a directory for the profile data file. Running any application that loads the library then causes the dynamic linker to collect profiling data automatically.
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If none of **-c**, **-p**, or **-q** is specified, the default behavior is to display both a flat profile and a call graph.
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# CAVEATS
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Only one shared library can be profiled at a time via **LD_PROFILE**. Do not compile with **-pg** when using sprof; the gprof profiling flag interferes with sprof and produces zeroes for execution times. sprof is a GNU extension and is not specified by POSIX. Requires glibc 2.5-34 or newer; older versions may fail with missing internal flags.
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# HISTORY
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**sprof** was written by **Ulrich Drepper** as part of the **GNU C Library (glibc)**, first appearing around **glibc 2.0** in **1997**. It was created to fill the gap left by **gprof**, which cannot profile shared libraries. The profiling data collection is handled by the glibc dynamic linker itself, making sprof unique in its ability to profile shared objects without recompilation.
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# SEE ALSO
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[gprof](/man/gprof)(1), [ldd](/man/ldd)(1), [ld](/man/ld)(1), [perf](/man/perf)(1)

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